The sun was doing more than just rising over the Dutch polders; it was waging a personal war against Elias’s morning coffee. As a freelance interior designer in Utrecht,
knew that "light and airy" was the dream, but "blistering and blinded" was the reality for his clients with south-facing floor-to-ceiling windows. His tablet glowed with the search result he’d been hunting for: NL Blinds Catalogue PDF – Summer Collection.
He tapped the download icon. The file was labeled "Hot"—a nod to both the seasonal demand and the specialized thermal-reflective backing of the new fabrics.
As the PDF flickered to life, Elias didn't just see window treatments; he saw a story of survival against the elements. There were the Zonnescherm
rollers in "Burnt Ochre" that promised to drop room temperatures by five degrees. Then, the
shades in "Cool Alabaster," honeycombed to trap the heat before it could invade a living room.
He scrolled past the technical specs—the U-values and the UV-resistance percentages—to the lifestyle shots. A canal house, perfectly shielded, where a cat napped in a patch of shade that should have been a scorch mark.
"Perfect," Elias muttered, dragging the file into an email to his crankiest client. "The heat stays in the catalogue, not in your house."
With a click, the "Hot" collection was sent, and for the first time that morning, Elias felt like he could finally cool down.
Based on current 2026 trends and NL Blinds' specific offerings, these are the standout items featured in their latest collections:
Zebra Blinds (Dual Roller): These remain a flagship "hot" item. The 2026 models feature bold patterns and slimmer dual brackets that allow for a more seamless transition between sheer and blackout modes.
Smart Motorized Roller Blinds: Automation is now a standard expectation. These blinds integrate with Alexa, Google Home, and Apple HomeKit for scheduling and voice-controlled light management.
Textured Roman Blinds: Moving away from flat colors, the "hot" Roman shades for 2026 prioritize tactile weaves like linen and cotton in earthy tones like sand, taupe, and muted green.
Energy-Efficient Honeycomb Shades: Highly sought after for their insulating cell structure, which traps air to reduce heating and cooling costs.
Aluminum Mini Blinds: Making a massive comeback in 2026 due to their durability and moisture resistance, making them ideal for kitchens and bathrooms. Key Trends Defining the 2026 Catalogue Curtain & Blind Trends 2026 | Concorde Blinds UK
. While "hot" in your query likely refers to trending products, NL Blinds' latest catalog features several high-demand window treatment solutions: Trending Products & "Hot" Features Zebra Blinds
: These are currently a "hot" item in their catalog, known for their double-layered fabric that alternates transparent and opaque strips for precise light control. Motorized Solutions
: A key feature in the 2026/2027 catalog is the integration of remote-controlled and motorized systems
for wooden and venetian blinds, catering to modern smart homes. Triple Shade Blinds
: A luxury option combining the features of venetian, roller, and roman blinds into one versatile system. Outdoor Weather Resistance
: Their "Monsoon Blinds" and outdoor venetian options are designed with weather-resistant materials like PVC or aluminum to withstand harsh conditions. Catalog Availability
You can access specific product details and visual styles through these official and verified channels:
NL Blinds began operations in 2002 and has grown into a market leader for window blind fabrics in India. With massive warehouses in New Delhi and Bengaluru, the company serves over 600 cities across the country. They are known for high-quality fabrics, fast dispatch services, and a wide variety of modern designs. Key Products in the Catalogue
Their current offerings focus on combining luxury with functional light control:
Zebra Blinds: Their "Volume-5" dimout collection is a popular choice for modern interiors, offering adjustable light and privacy.
Roller Shades: Includes Horizon Dimout and Graphic Blackout options, designed for a sophisticated, high-end appearance.
Venetian & Vertical Blinds: Available in materials like bamboo, wood, and PVC, with motorized options for added convenience.
Holland Blinds: Traditionally made from heavy linen or thick fabrics, these are valued for their superior light-blocking capabilities compared to standard rollers. Where to Find the Catalogues
You can access official PDF catalogues through wholesale platforms and business directories:
IndiaMart: Hosts various NL Blinds PDF documents, including technical specifications and the latest zebra blind volumes.
TradeIndia: Provides details for bulk buyers and direct contact with the company's Delhi-based headquarters.
NL Blinds Official Site: The primary source for the full range of window blind fabrics and company news.
The latest NL Blinds catalogue and trend reports for 2026 highlight a shift toward "warm minimalism," smart automation, and eco-friendly materials. As a leading importer and wholesaler, NL Blinds offers a comprehensive range of window treatments that align with these current aesthetics. Core Product Line
The current collection features versatile options designed for both modern and classic interiors:
Zebra Blinds: Dual-layered shades (sheer and solid) for ultimate light control and privacy.
Roller Blinds: Available in Exclusive Blackout Collections and moisture-resistant fabrics for kitchens and bathrooms.
Wooden & Bamboo Blinds: Sustainable choices including Wooden Motorized Venetian Blinds and natural bamboo textures.
Triple Shade & Honeycomb Blinds: Highly efficient "cellular" designs that improve insulation and reduce utility bills. Top Trends for 2026 NL Exclusive Blackout Collection for Zebra Blinds 2024
Target Audience: Homeowners, Interior Designers, and Contractors looking for the latest window treatment specifications. nl blinds catalogue pdf hot
“Hot” means three things this season:
The Problem: Users searching for a "hot" catalogue are often looking for specific high-demand products, best-sellers, or the latest trending designs. Standard PDFs are static; users must scroll through hundreds of pages to find what is popular, often missing key items.
The Solution: Transform the static NL Blinds Catalogue PDF into a data-driven shopping experience. When a user opens the PDF on the NL Blinds website or app, they can toggle the "Heat Map" view.
How It Works:
Why It’s a Winner:
Page 12 of the PDF
These blinds feature an aluminum-backed fabric that reflects up to 80% of solar heat. Perfect for south-facing rooms. Available in 15+ neutral and earthy tones.
Home automation is no longer a luxury; it is standard. The new PDF highlights battery-operated, motorized blinds that integrate with Alexa, Google Home, and Apple HomeKit. Look for the "Hot" badge next to the Aspen Smart Roller—a bestseller thanks to its whisper-quiet motor and 6-month battery life.
👉 [Link placeholder – Download NL Blinds PDF Catalogue]
Hurry — the summer promotion featured inside expires August 31st.
NL Blinds (NL Blinds Pvt. Ltd.) is a major importer and wholesaler of window blind fabrics in India, maintaining a presence in over 600 cities with large warehouses in New Delhi and Bengaluru. Their 2026 product catalogue emphasizes a shift from "quiet luxury" to expressive, tactile designs that prioritize comfort and smart functionality. Featured Collections & Products
The latest catalogue showcases several signature styles designed for modern residential and commercial spaces:
Zebra Blinds (Vision® Blinds): A cornerstone of their 2026 lineup, these dual-layer systems offer flexible light control. Notable new finishes include 'Zebra Magnolia' (soft, floral-inspired tones) and 'Zebra Madera Wenge' (deep, rich wood-inspired tones).
Exclusive Dimout Collection: Volume 5 of this collection focuses on luxury fabrics with a standard width of 310 cm, ideal for creating privacy without total darkness.
Roller & Triple Shade Blinds: These remain versatile staples, available in moisture-resistant and thermal fabrics for specialized areas like conservatories or bathrooms.
Wooden & Luxury Venetian Blinds: The 2026 range features wider slats and matte finishes, adding natural warmth and premium texture to interiors. 2026 Design & Tech Trends Exclusive Zebra Blinds (Dimout Collection) Volume-5 (new)
The Ultimate Guide to the NL Blinds Catalogue PDF: Hottest Trends & 2026 Features
In the world of interior design, window treatments have shifted from functional afterthoughts to central design statements. For homeowners and professional decorators, the NL Blinds Catalogue PDF has become a premier resource for finding high-quality, stylish solutions that balance light control with modern aesthetics.
Whether you are looking to download the latest NL Blinds Catalogue or exploring the hottest window treatment trends for 2026, this guide breaks down everything you need to know to transform your space. Why NL Blinds is a Market Leader
Since starting operations in 2002, NL Blinds has grown into a dominant importer and wholesaler, maintaining massive warehouses in New Delhi and Bengaluru to serve over 600 cities. They are currently recognized as a leader in the window blinds fabric market, offering a blend of luxury and practical innovation. What’s Inside the Latest Catalogue?
The NL Blinds Catalogue PDF features a comprehensive range of products designed for both residential and commercial spaces. Key collections include:
Zebra & Double Roller Blinds: These "Day & Night" styles are among the most popular items in the catalogue. They feature alternating layers of transparent and opaque material, allowing you to transition from full light to complete privacy with a single pull.
Exclusive Blackout Collection: The 2024–2025 "Wave Blackout" series for Zebra blinds is a standout for bedrooms and media rooms, redefined for maximum light exclusion.
Luxury Venetian & Wooden Blinds: For those seeking a timeless classic, the catalogue offers premium wooden finishes and high-quality metal Venetians that add organic texture and warmth to any room.
Triple Shade Blinds: Often cited as a sophisticated "evolution" of window shades, these provide effective functioning with a luxurious, three-dimensional feel. Hottest Window Treatment Trends for 2026
According to industry experts and the latest NL design updates, 2026 is seeing a shift toward "Quiet Luxury" and "Biophilic Design". If you are browsing the catalogue, keep an eye out for these "hot" features: 9 Window Treatment Trends & Ideas of 2026 - The Shade Store
If you are looking for the latest styles from NL Blinds, their 2026 collections emphasize "Warm Minimalism" and smart home integration. The brand, a major wholesaler based in New Delhi and Bengaluru, has released several updated digital catalogues featuring their newest blackout and dimout fabric lines. Hot Trends from the 2026 NL Blinds Collections
Exclusive Blackout & Dimout Series: The latest Volume-5 and 2024-2026 updates focus on high-performance fabrics for Zebra and Roller blinds that block light without looking "plastic".
"Warm Minimalism" Palette: Moving away from cool grays, the new "hot" colors include Sandy Beige, Warm Stone, Terracotta, and Mushroom to create a cozy, grounded feel.
Textured Zebra Blinds: Often called the "Swiss Army Knife" of 2026, these multi-tasking blinds now feature linen-look textures and geometric patterns that add artistic flair to living rooms and home offices.
Smart & Motorized Systems: Motorization has become a standard expectation. These systems integrate with Alexa or Google Assistant for hands-free control and can be scheduled to optimize energy efficiency. Top 9 Window Treatment Trends of 2026 | The Shade Store
When the knock came at the studio door, Lena had been tracing sunlight across a dusty windowsill. She was a cataloger by trade — not of stamps or books, but of small design objects: knobs, lampshades, salvaged tiles. Her work lived in neat photo grids and soft gray PDFs that made other people's things look like quiet treasures. Today’s delivery was a single slim envelope stamped with a curious return address: NL Blinds.
Inside was a printed sheet that smelled faintly of cedar and printer ink, folded once. On the front, an elegant sans-serif title: NL Blinds Catalogue. Someone had scribbled beneath it, in a hand that tilted like a shutter opening, “Hot list — new drop.”
Lena smiled. She had never heard of NL Blinds. The studio received so many catalogs that sometimes she turned them into paper swans. But this one tugged at her fingers. She unfolded the page.
Photographs spilled across the paper like sunlight through slats. There were blinds that remembered winter — matte charcoal bands that held a trace of frost. There were translucent shades that blurred the city into watercolor; others folded like origami cranes, sharp and pristine. Each sample came with a short note: the material, a code, a price. But beneath the practical lines, the copywriter had done something small and strange: they wrote what the blinds were good for.
“Louvre 07 — ideal for late afternoons and small arguments,” one line read.
“Paperveil — hides your secrets better than a curtain,” another promised.
Lena read on, slower, as if the words were blinks in a hidden conversation. The catalogue wasn’t just selling products; it was cataloging moods. The “Hot list” sheet, tucked inside, recommended three pieces for “rooms that wish they were stories”: a honey-toned shade called “Kin,” a deep blue slat named “Mariner,” and a velvet-lined blackout called “Nocturne.” Each item wore a short phrase like jewelry: “Kin — cozies up to found photographs.” “Mariner — keeps in the ache of memory, not the glare.” “Nocturne — for nights that refuse to end.”
Lena could almost hear the rooms in her head. She imagined a sunlit kitchen where “Kin” gathered around a chipped mug and an old borrowed sweater; “Mariner” in a studio where a painter worked at the edge of day, collecting pigments in the corners; “Nocturne” in a small flat where a violinist practiced until the moon left.
She set the page beneath a paperweight and opened her laptop. The studio’s next zine was themed “Small Interiors,” and Lena’s editor loved a story that began with an object. She traced the catalogue’s images into a moodboard, took photographs of her own window dressed with a thrifted linen scarf, and wrote a short piece imagining the lives each blind might keep. The sun was doing more than just rising
That night she dreamed of a house made entirely of blinds. Rooms slid back and forth like accordion maps. In one hallway, a child built forts from rolled-up slats; in another, an old woman stored poems between the folds. The house kept secrets by changing the light gradually, like someone reading a book by candle until midnight.
Weeks later, the NL Blinds package appeared again on Lena’s desk — a thicker envelope this time, and inside, a proper catalogue bound with twine. Someone had left a note: “For the project. - A.” No last name. Lena recognized the “A” only after a moment: Ansel, a photographer she’d once commissioned to shoot a set of ceramic bowls. He had moved cities without saying goodbye.
The catalogue was richer now: stories tucked under the prices, a tiny map of a city made of windows, and photographs not of products but of people by their blinds. A man in a raincoat tilting a slat to check the street; a woman asleep on a couch while a thin line of light traced her mouth; a boy playing shadow puppets on a kitchen wall. Each image felt like a postcard from a private sunrise.
Lena called Ansel. He picked up on the second ring. His voice had the gravel of someone who’d been outdoors too long.
“Did you get it?” he asked.
“I did,” she said. “It’s…warm.”
“It’s meant to be,” he answered. “We’ve been working with this small workshop outside NL — they make things by hand, like furniture for people who prefer to wear their memories.”
There was silence, like the sound of a street at four in the morning. Then Ansel said, “There was someone there who said your name. A woman. She said she used to live in a third-floor room over a bakery and she kept note of the times the light smelled like cinnamon.”
“How did she know me?” Lena asked.
“She didn’t,” Ansel said. “She just told small stories to anyone who sat long enough.”
Lena understood. The catalogue was less a marketing tool than a ledger of small human weather. It sold blinds but curated glimpses: the way a curtain ties itself to the daily habits of a room, how a shade learns which morning is for tea and which is for turning pages. Reading it made Lena feel like she’d been given a key to other people’s windows.
She arranged a photoshoot in her studio using the catalogue’s “Kin” shade — not a real sample, but a linen swatch she’d picked up in a market months before. Together with Ansel, she recreated a morning: coffee steaming, paperback spine softened, a single plant leaning toward the slant of light. He shot it in grainy black and white, and when she saw the prints, her chest tightened. The image felt like an old letter.
The printshop folded the zine. Lena’s editor placed her piece in the lead, and when copies arrived, people wrote in. Some sent short notes about the way “Mariner” reminded them of a childhood boat; others described a grandmother who sewed tiny curtains for dollhouses. A cafe owner in a different city attached a photo of his own window with a hand-lettered sign: “Therapy by appointment — light only.”
Months later Lena found herself at the edge of town, in a small workshop where boards smelled of sawdust and tea. The owner, a woman with paint on her palms, greeted her like she had always been expected. On a pegboard behind the counter, labels were written in the same neat, sideways hand as the catalogue notes. “Kin — 22,” “Mariner — 05,” “Nocturne — blackout.” The woman raised an eyebrow when Lena produced her old sheet.
“You found our first run,” she said. “We send those out to people who keep things.”
Lena laughed. “I keep windows.”
“You keep stories,” the woman corrected. “We make things that want to be kept.”
Lena bought a sample — a narrow slat of warm wood that fit the frame of her apartment window. When she installed it that evening, the light in her living room shifted in a way that felt like a soft conversation. Visitors noticed not the blind but the room’s new attention to itself. A friend lingered and said, “It feels like someone turned the volume down on the city.”
The catalogue continued to circulate. NL Blinds mailed another edition the next winter, then the next summer, each one folded with the same intimacy. People began to trade them as if they were small maps: “Have you seen the Nocturne?” someone would ask. “It keeps my insomnia company.” In coffee shops, strangers compared notes on the way certain shades held onto dust like memories.
Lena kept every copy. She turned them into a stack that lived on the lowest shelf of her bookcase. In the gaps between the catalogues she tucked postcards, pressed leaves, and a single photograph Ansel had sent of a streetlight cutting a perfect triangle across a wet pavement. Sometimes, when she couldn’t sleep, she would take one down, open it, and read the small, sensible descriptions. They were like prayers for domestic life — mundane, precise, and fierce.
Years later, when the city rearranged its tram lines and new buildings rose like blunt teeth, Lena would still think of the catalogue as a kind of compass: not for directions, but for how to live around light. It taught her to notice which mornings required curtains drawn tight and which begged for a thin slat to hold back the glare. It taught her that objects, when made with care, carry stories, and that a simple sheet of paper could open a room the way a window opens onto a street.
On a late afternoon in April, with the blinds sliding slowly to follow the sun, Lena placed the original “Hot list” sheet on her desk. The words that had once felt like small invitations now read like found instructions: make room for small joys; collect light; trade catalogues with people who kept things. She folded the sheet along the same crease and slipped it into the front of the newest NL Blinds — a catalogue no longer about products but about the people who live near the light they make.
Outside, the city went about its noisy business. Inside, the room listened. The blinds held back the glare, and the afternoon settled into a story that could be read like a catalogue: itemized, beloved, and quietly necessary.
The official NL Blinds Catalogue PDF is the primary resource for exploring the brand's position as a market leader in window blind fabrics. This guide explores the "hot" trending products and new launches for 2026, ranging from tech-integrated smart shades to nature-inspired textures. Explore the Latest NL Blinds Catalogues
You can access specific product segments through their dedicated digital PDF guides:
NL Exclusive Blackout Collection for Zebra Blinds: Features high-performance blackout fabrics for zebra (dual-layer) shades, ideal for bedrooms and media rooms.
General NL Blinds Catalogues: A multi-page visual guide showcasing the brand's diverse fabric textures and patterns.
Sparrow Screen Catalog : For technical specifications on smart-integrated screen fabrics compatible with modern motorization. Hot Trending Products for 2026
According to the NL Blinds official site, the following categories are dominating current interior design trends: Window Treatment Trends 2026 - Shades on Wheels
NL Blinds Pvt. Ltd. is a prominent provider of luxury window treatment solutions, specializing in contemporary designs like Zebra (Day and Night), Roller, and Dimout blinds. Their current catalog features an exclusive range of high-performance fabrics designed for modern residential and commercial spaces. Key Offerings in the NL Blinds Catalogue
The NL Blinds collection is defined by its "Redefining Luxury" ethos, focusing on both aesthetic appeal and functional light management.
Exclusive Dimout Collection: Specifically designed for Zebra blinds, this collection uses specialized fabrics to significantly reduce incoming light while maintaining privacy.
Zebra & Day and Night Blinds: A top-selling design that alternates sheer and solid fabric bands, allowing for precise control over light and visibility.
Large-Scale Solutions: The product line includes extra-wide options, with some fabrics available in widths up to 310 cm to accommodate larger window spans.
Modern Fabric Technology: The 2024–2026 product lines emphasize soft weaves, elegant louvre designs, and wipe-clean materials for increased durability and ease of maintenance. Technical Specifications & Performance
NL Blinds provides technical details to ensure proper fit and thermal efficiency:
Light Control: Options range from standard light-filtering to specialized blackout honeycomb fabrics.
Thermal Barrier: Many of their "hot" trending items include thermal linings that trap air to insulate rooms, keeping them warmer in winter and cooler in summer. Heat-blocking technology – fabrics that reduce solar gain
Slat Customization: For blinds with slats, the common 2-inch (approx. 50mm) width remains the most versatile choice for standard windows. Accessing the Catalogue
You can view or download the latest NL Blinds Catalogue PDF through official distributors or B2B platforms like IndiaMART (NL Blinds Catalogue). The current 2024/2025 Exclusive Dimout PDF highlights their newest "hot" fabric arrivals and luxury product lines. Copyright product line 2024 @ NL Blinds Pvt. Ltd.
is a leading importer and wholesaler of window blinds and fabrics in India, having started operations in 2002. The company maintains a massive infrastructure with two warehouses totaling approximately 50,000 sq. ft. in New Delhi and Bengaluru and a presence in over 600 cities across India. Catalog & Product Resources
While a single direct PDF link for a full "hot" catalog is not always hosted as a public static file, you can access their latest collections and catalogs through these channels: Official Website Downloads NL Blinds website
features a dedicated products section where you can view their latest launches, including roller, zebra, and triple shade blinds. Social Media Updates : The company recently announced that free NL Catalogues
are available (March 2025), offering one-day delivery for physical copies upon request. B2B Platforms
: You can request or view catalogues directly through trade portals like
, where various sellers list "NL Fabric" product specifications. Key Product Range
NL Blinds specializes in a wide variety of contemporary window treatments: Roller Blinds : Versatile designs suitable for many environments. Zebra Blinds
: Also known as double roller blinds, available in various fabric collections. Wooden & Bamboo Blinds : Includes luxury Venetian styles and bamboo options. Specialty Blinds : Triple shade, Verman, Roman, and Honeycomb blinds. Motorized Options
: Many of their Venetian and roller blinds are available with motorized controls for modern convenience. Company Information
In the evolving landscape of interior design, the NL Blinds Catalogue
has emerged as a definitive guide for homeowners seeking to balance luxury with modern functionality
. Based in New Delhi and Bengaluru, NL Blinds operates as a leading importer and wholesaler, providing a comprehensive range of window treatments that cater to the aesthetic and practical needs of over 600 cities across India. The Core of the Collection latest 2024–2025 PDF catalogues highlight a specialized focus on Zebra Blinds
, particularly their exclusive "Dimout Collection". These dual-layered shades allow for precise light control, alternating between sheer and opaque fabrics to manage privacy and brightness seamlessly.
The product portfolio includes a diverse array of styles designed to fit various architectural aesthetics: Roller Blinds
: Celebrated for their minimalist and clutter-free design, offering excellent light control and thermal insulation. Triple Shade Blinds
: Often referred to as a "timeless classic," these provide a sophisticated three-dimensional look. Natural Materials : The catalogue features Wooden and Bamboo Blinds
, which align with the 2025 trend of bringing earthy, nature-inspired elements into the home. Specialized Solutions : Beyond standard windows, the range covers Roman Blinds Honeycomb Blinds for energy efficiency, and Aluminium Venetian Blinds for industrial or modern office settings. "Hot" Trends in Window Treatments Current market demands, as reflected in the NL Blinds ecosystem , emphasize several "hot" innovations: Motorization and Smart Tech
: Integrating with home automation systems, motorized options allow users to control window shades via remotes or smartphone apps, enhancing both comfort and safety by removing cords. Layered Textures
: A popular designer trend involves pairing blackout blinds with sheer curtains to create depth and flexible privacy. Bold Palette Shifts
: While neutral tones like "smoke" and "sandy beige" remain staples, the 2025 season is seeing a surge in vibrant colors such as Apricot Orange Black Iris to create focal points within a room. Copyright product line 2024 @ NL Blinds Pvt. Ltd.
Introduction
NL Blinds is a popular brand that offers a wide range of window blinds and shades. Their catalogue is a valuable resource for homeowners, interior designers, and contractors looking for high-quality window treatments. In this guide, we'll walk you through the NL Blinds catalogue PDF, highlighting its features, benefits, and how to access it.
What is NL Blinds Catalogue PDF?
The NL Blinds catalogue PDF is a digital version of the company's product catalogue, available in Portable Document Format (PDF). This format allows users to easily view, download, and print the catalogue. The PDF catalogue provides an in-depth look at NL Blinds' products, including their various types of blinds, shades, and accessories.
Features of NL Blinds Catalogue PDF
The NL Blinds catalogue PDF is a comprehensive resource that offers the following features:
Benefits of NL Blinds Catalogue PDF
The NL Blinds catalogue PDF offers several benefits to users, including:
How to Access NL Blinds Catalogue PDF
To access the NL Blinds catalogue PDF, follow these steps:
Tips for Using NL Blinds Catalogue PDF
Here are some tips for getting the most out of the NL Blinds catalogue PDF:
By following this guide, you'll be able to access and make the most of the NL Blinds catalogue PDF, helping you find the perfect window treatments for your home or project.
Hot Tip: If you're looking for a specific type of blind or shade, use the search function in the catalogue to quickly find it. You can also use the bookmarks and hyperlinks to navigate the catalogue efficiently.
The term "NL" in window treatments most commonly refers to Next Level Blinds, a prominent manufacturer known for motorized and smart home integration. However, it can occasionally refer to generic "New Level" or similar naming conventions. This guide focuses on sourcing professional catalogues for specification and design purposes.