Feedback About Rosin

So, I’m in the process of making rosin carts. I’ve purchased some rosin, and figured out the decarb and 5% cut to get it in the carts and flowing well. Now I have to make decent rosin in-house, and getting nice color is proving difficult.

I started the dry sift route with 3 month old cured bud, sift looked pretty nice, rosin was super dark. Then I tried water hash with low-quality fresh frozen, hash didn’t look very bright, rosin was just as dark. I did not utilize a cold room, but, everything was washed very cold.

I’m thinking it has to be the starting material… but, as usual, they don’t want to buy nice material for R&D. Anyone with experience mind giving me some feedback? Am I correct in assuming only fire material will produce light colored rosin? Or is there likely something wrong with my sifting/washing/pressing procedure?

New material is better is what I get from here.