Thank you, Vivien, Joan, Debby, for your comments.
Last month I have invested in $20 worth of Artist Magazines annual discs at $2 a pop and I finally started reading it. In the 2002 April issue, I realized that green and purple makes blue. It totally vowed me to see the experiments and so I tested it on one of my work place sketch near where I work some months ago.
Stillman & Birn Alpha 100 lb hardbound 5.5 x 8.5 inch.
Holbein Mineral Violet
Phthalocyanine green M. Graham
Technically, purple is a mix of red and blue and green is a mix of blue and yellow and so the blue will come forward. But if we use a different type of violet, eg sap green and carb. violet, it will give you brown instead.
This one is also on Stillman Alpha same sketchbook.
I rarely used Prisma's Col-Erase even though it is very erasable mainly because it is very hard and it makes indentation on the underleaf and the pages following. I don't always remember to bring an insert buffer and also the colors are not very intense. It's rather pastel like.
But thinking about this Alpha, I gave it a try. The paper is thicker than most paper and even though I rather reserve Alpha for mixed media because it could take some moisture, I am willing to experiment.
It did quite well with the texture.
This one I used Lyra Polycolor and the garment was Lyra and Prismacolor Artstik. I erased the Lyra here and there and because Stillman has more texture, it could support erasures and not leave a smudgey residue color whereas the Pentalic didn't have any more texture after electric erasures.