Digital BW, The Print

I am about to mix a carbon-6 inkset by diluting eboni, with water, glycerol and a surfactant.

The recommended surfactant is Kodak Photo Flo. I am in the UK and it is much easier and cheaper for me to get Ilford Ilfotec. Does it matter which wetting agent is used? I don't think these 2 products are the same as the dilutions for darkroom work are different.

With regard to glycerol is the food product OK? It is easy for me to get this, but I don't know if it is of the required standard. For example it usually states something like 'Technical Food grade 99.8%' on the bottle.

Thanks for any advice.

Mark.