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Old 10-28-2009, 09:51 AM
sidbledsoe sidbledsoe is online now
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Re: Caput Mortuum

I must get up to speed with the color evaluation programs, no I haven't, but I copied Jim's chart zoomed in on the mars violets then opened mine over it so I could compare them right side by side, I think it looks similar to the two violets considering all the subtle differences between our whites used, cameras, lighting, etc. The Caputs I believe are a litte more murky or dark though the values are all 2 by Jim's chips.
BTW I am still not exactly clear on what the diff would be between a 5R and a 7.5R regarding hue only. Is a 7.5 closer to RP and would a 2R be more orange?
The only Caput near me is Old Holland at Utrecht and I don't want to send an order to Vasari for one tube so I may get the OH, I will tint it out next to the WN mars violet when I do. These are stong tinters and should last me a long time.
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Old 10-29-2009, 06:02 AM
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Einion Einion is offline
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Quote:
Originally Posted by sidbledsoe
I must get up to speed with the color evaluation programs...
If you don't have a copy of Photoshop, GIMP is available for free and will do everything you need.

One of the things programs like this are so valuable for is to identify the actual hue of something in an image and compare it to your impression of the hue, which can be surprisingly off at times! Here, although I think it's easy to judge the hue of the masstone as orangey (if not a little more accurately than that) the tints appear more violet than they are. In the photo the lightest tint is not even close to the hue of magenta despite how it might appear.

This is one of the well-known colour illusions with dull reds, which can often appear significantly more violet than they actually are; similar to how dark or dull yellows look green.

Quote:
Originally Posted by sidbledsoe
BTW I am still not exactly clear on what the diff would be between a 5R and a 7.5R regarding hue only. Is a 7.5 closer to RP and would a 2R be more orange?
This diagram was posted in another thread sometime last year, should help:



I'm not a fan of the hue designations in Munsell, valuable as the chroma and value numbers are.

Einion
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Old 10-29-2009, 06:17 PM
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gunzorro gunzorro is offline
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Re: Caput Mortuum

Sid -- Here are quick and dirty photos I just took of the pages in question with the specific hue range from the examples in the chips I placed on the paint.

Munsell color chips ranging from 2.5R (red) to 10R



Munsell color chips ranging from 2.5RP (red-purple) to 10RP



You'll see here that some are decidedly orangey and others are decidedly magenta to violet/purple!

If you look back at the paints/chips, you'll see each of these eight hue sections is represented, some at very low chroma and high value.

For the uninitiated: Each sheet is encompasses 1/4 of a specific Hue range. Chroma is gauged at 2 on the far left to 16 on the far right of each sheet (chroma can extend further for some colors and supplemental chips are provided). Value is the vertical range, from 2 at the bottom to 9 at the top.
 


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