Cosmetics Formulation Development

Hello, I have ordered Hydrolyzed Silk Protein ( Sericin , Powder) was used to test dissolving with น้ำกลั่น it won't dissolve. It's still the same powder. Try the stirring and blending method. Try dissolving in warm water. The result is a granular powder. when left for a long time until overnight It will precipitate in both warm and cold water mix. Try taking it out and rub it on your skin, it won't dissolve at all. grainy ผงสครับ skin, please suggest me how to dissolve it. thank you very much

Hello, please advise the mixing rate (powder Sericin and water) in grams as well.