So what does this CAD really do for me?

Luckily, the times when we needed to explain why you need a CAD are history.

But if you are new to this field, we will gladly explain why people buy our products.


Our customers are:

- Weaving mills

- Design studios

- Schools

They will use dobby or jacquard weaving technology to actually produce the fabric, or to pass the necessary data to a weaving mill.

Software is available in the folowing languages:

Chinese         
English         
Finish         
French
German

Italian
Macedonian
Polish
Spanish
Slovenian
Thai
Turkish

 

You can choose between three software programs according to your needs:

- Our free software ArahPaint enables you to draw seamless patterns

- ArahDrape helps you create simulations of the final products, using your pattern or fabric

- With ArahWeave, you can manage your jacquard and dobby production, or pass the data to a weaving mill


... more information

 

 


Colors in ArahWeave

Colors are the single most important aspect of a textile CAD. If we can't get the right color, we are not much better than ASCII production database.

If you know some other CAD systems, you may be accustomed to browsing through pages and pages of color atlases (different for each printer and print mode), or changing RGB sliders and printing ad infinitum. Without getting much closer to the right color. And with ever shorter deadlines, you simply can not afford to play the color game in this way.

So how do we get the right color?

Using colorimetry. All the colors are stored in device independent CIE Lab space, and all you need to do is enter three values that you read from a spectrophotometer. The screen and print colors are generated automatically based on device profiles. Using thousands of measurements and some mathematics, but you do not want to know that.

It is possible to make a company specific color databases with up to 200.000 colors.

For optimal results, we recommend use of spectrophotometer (like Datacolor Microflash or GretagMacbeth Spectrolino), to measure CIE Lab values of each yarn color. Based on these, screen and print colors are automatically calculated using our color device profiles and colorimetry software.

Support for user specified screen gamma correction.

Besides CIE Lab values, you can also enter a name and code for each color.

Colors can be sorted according to code, name, L (lightness), a (redness), b (yellowness), Chrome, Hue, Saturation.

Several color measurements by spectrophotometer in CIE Lab color space can be read in the system as an ASCII file.

Program gives prediction of its color accuracy as dE CIE Lab, so you know in advance if your color will be very accurate of far out.

Color databases can be printed out in an arrangement specified by the user

It is possible to specify background color for simulation (transparent fabrics)

Support for PANTONE® TEXTILE - get very accurate printout and screen colors by using one of the world's most popular textile color standards

Support for RAL Design System © 1997 RAL, Sankt Augustin

Search for any color backwards or forwards by code or name

 

To give you an idea of or color accuracy: we get an average dE CIE Lab = 2.4 on Epson Stylus Photo 750/1200 for all of 1932 colors contained in PANTONE® TEXTILE. And you know that many of its colors are pretty much out of color gamut (area of printable colors) of any ink-jet printer.

In the following picture, you see the color editor with PANTONE® TEXTILE-paper palette loaded. Below are colors for warp (capital letters A-Y) and weft (small letters a-y), and the color editing area.

Color editor with PANTONE

One of the unique features of ArahWeave is, that program gives you a feedback on the screen and print accuracy of the selected color. This is indicated with the dE values on the right side of the window. If it displays a dE less than 2, it means that you are within color gamut and that color is reasonably accurate. If you have a dE of 15, you know that you will not get the desired color. In this way you can at least warn your customer that this particular color is not correct, and attach a yarn sample to the printed fabric simulation. Note that the predicted dE is usually overly optimistic, since it represents the difference of the desired color and the color found by the color matching engine of ArahWeave. We did an experiment and printed out our simulation of all PANTONE colors, re-measured them and compared the predicted color with the actual simulated color. The dE was smaller than 2 for 92% of colors, and smaller than 3 for 99.5% of colors. There were no prediction errors bigger than dE 4. So you can be reasonably confident in the program's prediction.

To avoid any misunderstanding regarding color accuracy, you should understand the notion of color gamut.

One common mistake is to link the actual number of displayable colors with color accuracy. When we were making the transition form 8-bits graphics cards with 256 colors to 24 bits per pixel graphics card, we said we now have 16 millions colors at our disposal - in a sense - we can do any color we like. Surely, it was a big step forward, but it has nothing to do with color accuracy. Actually, we could have 16 millions levels of gray between black and white... We need much more for color accuracy - primary colors that have the most extreme values in CIE Lab space, then a method color mixing and which makes them as predictable and linear as possible. And finally, a method of finding the desired color out of those we can generate.

ArahWeave will find the best possible color, but it can not make a color, which is not within device's color gamut. In the following pictures, you can observe the gamut of two commercial color atlases and one ink-jet printer. Notice how the areas, which they cover are quite different. First group of colors represent a projection of L versus a, second is L versus b and third is a versus b. Since we want to reproduce them on the ink-jet printer, we can indicate out of gamut colors with a small point.

All measurements were executed using GretagMacbeth Spectrolino, D65 light, 2 degrees angle. Spectrolino is directly supported from ArahWeave - you do not need any additional software to use it.

Color gamut of PANTONE

The color gamut of all PANTONE Textile Color System® colors. Note that PANTONE colors are really a collection of colors without strict ordering in mathematical sense. In fact, some colors have very extreme out-of-gamut values, which makes them impossible to reproduce on any ink-jet printer, even on 6-color ones. The choice to include out of gamut colors still makes sense: PANTONE® TEXTILE is targeting the fashion market, where such extreme colors are actually used. We must know precisely what we want, even if we can not reproduce it on a ordinary ink jet printer.

Color gamut of RAL

The color gamut of all RAL© colors. You see that most of colors are within gamut of ink-jet printer. The equidistant arrangement of measurements confirm that RAL's color choice is really based on CIE Lab.

Color gamut of Epson Stylus Photo

The color gamut of all colors printable on Epson Stylus Photo 750/1200, a 6-color ink-jet printer. Picture contains 5832 colors, which are basis for our printer's color profile. A careful observer will notice anomalies caused by under color removal and switch from light Cyan/Magenta to dark Cyan/Magenta. Note that the color gamut of ink-jet printer depends a lot on the printer driver. We have developed our own printer drivers, aiming for large color gamut and linearity in color reproduction. The supplied drivers, which we have examined, mainly aim for reasonable reproduction of screen RGB to printed output, and score poorly both on linearity and color gamut.

Competitive programs, which run under Windows, support all types of printers, since the driver is provided by the printer manufacturer. But the output of these programs is limited by the quality of the printer driver. So even if they create their own ICC profiles, to replace the factory provided one, which is usually of poor quality, they still can not escape the printer driver's limitations.

Any experienced textile designer will tell you, that fabric is much more than a sequence of black and white dots on the weave, indicating thread lifting. The true fabric aspect depends even more on the warp and weft density, yarn count and respective yarn diameter. With ArahWeave software for weaving, you will be able to anticipate these effects on screen, at any density or yarn count, without unwanted Moireé patterns.

  Warp 10 threads/cm 15 threads/cm
Weft
10
threads
/cm
fabric density in ArahWeave fabric density in ArahWeave
15
threads
/cm
fabric density in ArahWeave fabric density in ArahWeave

An even more puzzling question is what makes a multiple layer weave? Again, it is a question of weave and density. If weave is designed in a special way and density is correct, threads will move in the direction of lower tension. With a simulation from ArahWeave, you will not be in doubt.

Double weave with ArahWeave software for weaving

Double interchanging plain

Weave above, and fabric simulation in different densities below. Fabric is shown with fringe.

double fabric density Dobule fabric density Dobule fabric density
density 10/10 threads/cm density 15/15 threads/cm density 20/20 threads/cm
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Supported color libraries

Supports CNCS color librarie

Supports RAL color librarie   Supports Pantone color librarie

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Supported textile machinery                                                                                 Contact Arahne for support of particular brand and model

arahne supports avl formatArahne supports Bonas loom formatArahne supports cci formatArahne supports Digital weaving Norway machineryArahne supports Dornier looms formatArahne supports Elm machinery  Arahne supports grosse looms format  Arahne supports Muller looms formatArahne supports Nuovo Pignone formatArahne supports Panter formatsArahne supports Schleicher formatArahne supports Suzuki machinery

Arahne supports Tongyuan formatArahne supports Smit textile machineryArahne supports Somet looms formatArahne supports Staubli looms formatArahne supports Sulzer textil machineryArahne supports Takemura formatArahne supports Tis machineryArahne supports Toyota machineryArahne supports Picanol machineryvamatexArahne supports Nissan format