I'm trying to (reasonably) match a color. I'm using some powdered dyes. I've made a couple of very small batches that are moving in the right direction.
But...
These powders are very concentrated. A small amount more or less will make a large difference. I doubt my ability to measure accurately enough to scale up a "successful" test batch to make enough for the whole project.
I figure I'll have to estimate a "formula" for the full batch, then try it out repeatedly on scrap as I tweak it. When I think it's close enough I'll apply it to the project. My question is, how big a batch should I make? There's about 30 square feet of surface on my project.
I'm anticipating that someone will tell me I won't really know what the color will look like until the test pieces dry. That brings up my second question: How long will the dye solution be usable after it is mixed? Hours? Weeks? Months?
Thanks in advance.
Greg Guarino