Pretty much everything seems to increase viscosity
and foamer bottles require really water-thin soap so they work properly, otherwise they may break of clog from viscous soap.
The starting formula is really simple:
9% active SLES
3% active CAPB (increases viscosity)
1-1.5% active Cocamide DEA/MEA/oleamide (increases viscosity)
0.5-1% PEG-7 Glyceryl cocoate
citric acid to pH 5
no salt (it would increase viscosity too)
when it arrives I'll try
0.25% HPMC to make them foam "tighter" and more stable (but likely it will increase viscosity too)
At this point I don't know what else to do
only diluting everything by at least 50% seems to work
and I can't switch SLES, CAPB because of projected costs and because we already have several drums of it.
Any ideas will be greatly appreciated.