Credit where credit it due! ...and Tip about Acrylic Paint Hue and Tube Labels

First , I want to share with you the name of the artist who painted the two paintings (the dazzling eggs and the handsome portrait) in my last post:- hers was the very meticulous studio - white, organized and lovely.  Suzanne Berry.  I've long subscribed to her blog and love seeing her work and, as importantly, reading about her journey.  Check it out!  http://suzanneberry.blogspot.com/

Secondly, a student asked me about tubes of acrylic paint marked Hue.  I tried to explain about the label and hues but not sure I was clear. The particular color in question was Alizarin Crimson.   Here is some info about the Golden Alizarin Crimson Hue that was in question:

The chemical name for Alizarin Crimson is Quinacridone / Chlorinated Copper Phthalocyanine. The ratings on the Alizarin Crimson Hue are:

Transparency Level: 4   (high - very transparent)   Good as a glaze, to mix or as a think color.
Lightfastness:  1    Excellent!  not likely to fade or change colors over very long time.

ASTM International (formerly known as the American Society for Testing and Materials) classifies artists' colors based on a test that simulates 20 years of gallery exposure.  Lightfastness standards that you should look for when selecting paint: 
ATSM 1 = Excellent 
ATSM 2 =  Very Good
ATSM 3 = Not Sufficiently Lightfast

Here's a good link to learn how to read the label on paint:
http://painting.about.com/od/paintingforbeginners/ss/PaintTubeLabel_5.htm

Also you can go on the Golden Site ...research/support and find all kinds of important information about their products.  
http://www.goldenpaints.com/