what is the difference between arcrlic yarns and arcrlic fiber yarnsand which one has better absorb from water amd last longer
It all depends on what kind of fibre it isAnimal or plant fibre will dye using Rit, but any synthetic will notBlack is a very difficult colour to get no matter what material it is and which dye you useBlack does not hold wellI would say this is a blend of some sort, probably not wool, but mostly some sort of acrylic and you will not be able to dye it satisfactorilyJust buy one in the colour you want - much simplerYou can find black anywhere - it's a basic colour.
I wouldn't do it, just buy a new cap
Any of the acrylic yarns are pretty long lastingFor the ability to absorb water you need a natural fiber such as cotton But I use Red Heart brand yarnIt's an acrylic that's quite inexpensive and I've found it to be very durable.