By Ken Butts
Ultra-portable devices can be important tools for textile color measurement. Small, inexpensive, and relatively accurate, these instruments meet specific industry challenges. I recently discussed ultra-portables in a presentation to the AATCC Coloration Challenges symposium. Here are some key points from that event.
Objective color evaluation matters
For 40 years, businesses have understood that objective instrumental color evaluation improves efficiency in the overall color development process. In production, objective color evaluation ensures accountability at a reasonable cost, helps identify problem materials or colors quickly, and helps transition companies from visual sample evaluation to precision color management.
Accurate textile color measurement also helps designers to be more efficient. They don’t have to develop new colors where standards already exist, don’t have to buy as many samples to compare colors, and can efficiently match components such as thread and zippers.
It’s a challenge to blend objective color selection methods with selection based on personal aesthetic and inspiration. Yet color measurement that’s available at the point of color selection can support both the goals of the business and the designer’s creativity.
Spectrophotometers, the instruments often used to control color quality of fabric in production, are highly complex and not truly portable. Even if it’s not as accurate as a spectrophotometer, a low-cost instrument equipped with mobile apps and small enough to carry in a pocket or purse may be ideal in certain circumstances.
For example, with an ultra-portable device a designer could easily measure colors at a fashion show or in a competitor’s store — and then determine whether the color is in their own library or available from a color standards provider.
Optical design of ultra-portable devices
A number of ultra-portable instruments have been released in the last couple of years, sometimes branded with the logo of the companies that adopt them. While designs vary, most devices include:
- LED illumination
- A method of filtering and consolidating light
- A sensor
Here’s a typical design.
Similar to colorimeters, these devices produce color responses for a specific light source that can then be used to calculate results such as CIE L*a*b* values.
Features and performance
Color look-up is currently the primary application for ultra-portable color measuring devices. Essentially:
- User makes a measurement
- System returns one or more matching colors from one or more databases
- Result are displayed on the device, a mobile app, or both
In addition to displaying color matches, the mobile app may allow the user to build palettes and share information with others.
The prices and capabilities of ultra-portable devices vary considerably, as shown in the following table. Brand names aren’t included, since I’m not endorsing one over another here.
|Integrated White Tile||Yes||Yes||No||Yes||No||Yes|
|Weight||29 g||60 g||61.5 g||165 g||50 g||60 g|
|Dimensions||27.5 mm dia x 55 mm||30 mm dia x 109 mm||144 x 52 x 40 mm||60 x 54 mm||51 mm dia x 51 mm|
It’s interesting that while higher price typically correlated to higher performance, only two instruments achieved a 94% success rate: one cost $250 and the other $700.
Other use cases
In addition to providing quick and easy color matching for designers, ultra-portable devices offer benefits for others in the industry.
- Trim and accessory manufacturers can take advantage of more efficient color search for customers
- Color standard providers can use branded mobile apps and devices as sales and marketing tools
- Future developments might make ultra-portables useful for performing basic textile color quality control functions, cataloguing warehouse inventory, and other tasks
If you’d like to discuss ultra-portable instruments in greater depth, please contact me directly or subscribe to our newsletter to get the latest updates.
Ken Butts Global Key Account Team Manager, has an extensive background in textiles with over 30 years supporting the trade. Ken leads the worldwide specifiers team – a unit designed to work closely with brands, retailers, customers, and prospects to understand and overcome the inherent challenges of the textile industry.