Liz Swain

Hi, I want to mix two different companies porcelain clays. One has shrinkage of 8% (+\- 2%) and porcelain that shrinks 12%. One is colored porcelain and I am not fond of how it works with my handbuilding techniques. The other is my go-to porcelain. I want to mix in order to create softer colors. I know I should test but ,Any help would be appreciated before I do. Thanks.