August 2008

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Within ScotWeave, HSV (Hue, Saturation, Value) values are used to define screen colours and PCR (Page, Column, Row) values are used to define printer colours. There is a degree of correlation between these two colour systems which means that HSV values can be applied directly to PCR values as a quick method of obtaining an approximate printer colour.

This property is useful if you have changed to a new ScotWeave printer and have a number of existing yarn files that have not been matched to this new printer. Since the yarns are not matched to the printer they will have 0,0,0 as their PCR values. This could lead to black printouts or black yarns within a printout where a yarn has not been matched.

To avoid this problem ScotWeave has the facility to automatically and quickly match all yarns in all yarns files such that the PCR values for every yarn will be made the same as the HSV values.

This procedure is carried out in the Yarn Designer program as follows -

1. Start Yarn Designer as normal
2. Select Colour - Match PCR to HSV
3. To match a single file choose Select Yarn File
4. To match all files in a folder choose All Files In Folder
5. Click on a yarn file
6. Answer Yes to the warning messages

Note that this will change any matched PCR values for the currently selected printer. If you have manually entered PCR values for the currently selected printer then these will be lost. This procedure should be carried out immediately after changing the ScotWeave printer and before any PCR values have been entered.