I bought these with a special purpose in mind and am finding that they are too opaque for the job I had in mind. I am sure they are good markers for some other usage just not for what I had in mind. I had to buy a five-pack to get the green marker I wanted. It would be much more convenient to be able to purchase markers individually for specialized uses such as I had in mind. This applies to all brands not just Tru Red. Thank you.