I am working on 3D printing with PEGDA.

I have been using Mn 700 PEGDA, but think that Mn 250 PEGDA would be more suitable for this application. The problem is that I found out that Mn 250 PEGDA is insoluble in water, which is a problem since the photoinitiator I am using is only soluble in water. When we added the photoinitator to only Mn 250 PEGDA, it did not dissolve enough to print. Most of the literature I found in the same area uses Mn 250 PEGDA, but they use a different photoinitator. We cannot change our photoinitator, so I am wondering if there is any way to make Mn 250 PEGDA more soluble in water. Possibly using a cosolvent?