It is true that the substrate is 95% of your actual acquired gloss you can expect.
There are many 'gloss' series of inks in the marketplace. The most significant property of these inks are low tinctorial color strength. Lower pigmented inks result in more vehicle content which is the most important ingredient in gloss formation in the ink film. Beyond that, the selection of resin types, drying oils to thoroughly wet the pigment agglomerate and wax selection are the other main contributory factors.
Depending on what you are looking for, keep this mind. No ink series will provide as much gloss as an overprint varnish, or even more particular a UV coating, spot or flood. If it is contrast you are looking for in a print piece, I would recommend printing with you normal process series and overprint as mentioned for your best effect.
If it is just one job you are looking for you can actually do it yourself, I doubt you will find much technical help of meaningful purpose from your commercial ink supplier. The method would be to add 20-25% of hi gloss overprint varnish to each K-C-M-Y to run the job. Keep in mind that you will blow the dot out some, but for one job, you can adjust your keys to accommodate the reduced rheology. Also adding 5-6% of high body gloss press varnish can help, but not to the extent of the 20-25% addition of O.P. varnish. Hope this helps and gives you some better understanding.
D Ink Man
