Happy to help - but sorry, I don't understand your question.
How do dealers cut heroin? By using a variety of cutting substances and techniques to add weight whilst mimicing taste, consistency and colour of the original product.
I'm not sure what you mean by 'if I had 10 grams of some good bmore raw how much cut could i put on it and it still be good'?
Do you mean, 'I've got 10 grams of bmore row, how many extra grams can I cut it with and it still be good?'
1) 0g. However much you cut it by, it'll never be 'still as good'
2) I hope I'm right in saying that you are not cutting it to increase it's weight, for then you to consume it personally... and that:
3) You have 10g and are looking at how much you can get away with cutting it.
Answer to the last question, it depends what substances you cut it with. IMO cutting sucks and is the reason why I only stay to pharma - because I know what I'm getting.
Just making up prices but if you have:
10g of quality product and the current street value for quality product is $10/g - You'd sell it for $100
15g of poor quality cut product and the current street value for poor quality cut product is $6.66/g - You'd still sell it for $100.
Don't be lame, don't cut it, sell quality product and as a connect - you'll have much more repeat custom because your product is good quality, and the user subsequently experiences a great (and safer) high.
Unless I've misunderstood your question, as I already aforementioned? If I've read this wrong, please clarify what you really meant.