Guide
Disclosing a formulation without losing it
Updated
Tolling requires disclosure of the thing you least want to disclose. That is manageable, but only before disclosure, because afterwards you have no leverage at all.
Settle it before the sample
Confidentiality, non-use and the scope of any non-compete are negotiated before you send a formulation, not after. Once it is disclosed, your position is whatever you agreed beforehand.
Non-use is the important one and it is frequently missing: confidentiality stops them telling people, non-use stops them using it.
Define the field
A blanket non-compete is usually resisted and often unenforceable in scope. A defined field, a defined customer set or a defined period is more likely to be agreed and more likely to hold.
Ask directly whether they already make anything similar for anyone else. It is a fair question and the answer shapes what you should disclose.
Process improvements
During the work the blender will learn things about making your product better. Who owns those improvements is ambiguous unless the agreement says, and manufacturers commonly assume they own process knowledge developed on their equipment.
Settle it explicitly. This is the clause most often missing and the one most likely to matter if you later move.
What survives termination
Confidentiality and non-use should outlast the supply relationship, and the agreement should say for how long. So should any obligation to return or destroy materials and documentation.
Write the exit into the beginning. It is the cheapest point at which to negotiate it.