which printer are you using? Some printers allow to set the pressure within the nozzle

I agree with Patrick, it should be important to know type of printer, bubble jet or DOD? in first case the low boiling solvent is useful in second case it is more complicated because its tendency to evaporate influence the viscosity and, depending on the printing head, there is a quite strict range of viscosity and surface tension at jetting temperature. If you give more data I can try to help you.

I'm using Dimatix Ink jet printer

Currently, the kinematic viscosity is 10-15 Cst and the solid content is 10-15%.

The printer is using piezoelectric ink jet technology.

http://www.fujifilmusa.com/products/industrial_inkjet_printheads/deposition-products/dmp-2800/

Hi Dr Graziano, my printer is piezoelectric DOD ..the ink that i bought is ink jet coating which contain 1-methoxy-2-propanol.

Well you should know the surface tension of your ink. Check the pendant droplet or the capillary rise method. Fujifilm dimatix offers guidelines where the surface tension should be.

I'll link a good reference book for IJP

http://eu.wiley.com/WileyCDA/WileyTitle/productCd-3527319042.html

Thank you so much Patrick for the book.

From what i found in the link below, the recommended Surface Tension = 32-42 dynes/cm at jetting temperature to avoid dripping from the nozzle.Is it the recommended surface tension from Dimatix?

http://seeen.spidergraphics.com/cnf5/doc/Ink%20formulation%20tutorial.pdf

According to the supplier, the Surface tension of main solvent in 1-methoxy-2-propanol (with surfactant) is 70.7 mN/m at 20°C almost the same as surface tension of water.

However, actual surface tension of IJC2 solution needs to be determined.

I think the surface tension is adapteted to avoid dripping but what about viscosity? I saw that 1-methoxy-2-propanol viscosity is 1,7Cp.

You must measure the viscosity of your ink. The optimum value is 10Cp. Perhaps you can add ethylene glycol to your ink in order to increase the viscosity of your ink.

Have a look in this publications. A method is explained to qualify an ink:

http://pubs.acs.org/doi/abs/10.1021/acsami.5b06678?journalCode=aamick

http://pubs.acs.org/doi/abs/10.1021/acsami.5b06678?journalCode=aamick

Some companies play around with temperature as well. Here are some information: 

http://www.rheosense.com/applications/viscosity/inks-high-shear 

I think its batter range od viscosity for solvent ink is 8-10 cp @ 25 degree and surface tension is about 23-25 Nm/m .

Er kan ook een te lage onderdruk op de printkop staan. Probeer eens de onderdruk te verlagen totdat de inkt niet meer uit de kop druppelt.