"He who marches out of step hears another drum." ~ Ken Kesey
Leaving for the weekend but short laymans answer is long bodied inks are more difficult to shear therefore often need to print slower. There are fixes for this of course.
Example that made sense to me was honey and cool whip--honey is long, cool whip is short.How about tack?
Jon,Is it the SF Low Bleed or Cotton White?LB is "runnier" and the cotton is "shorter". We use both in the shop.I can run at 40-50 speed on my Sportsman EXG using the Cotton SF when it's a good batch. If it gets to short, it will just climb the squeegee and never come back down. It will also slide out the sides of my wing floodbars.....The benefit of a short bodied ink is it gives you the best micron for micron match of your film positive. I.e. if you are printing a greyscale image, you will see very verrry little dot gain.Shorter inks allow you to use less pressure to shear the ink, leaving more on top of the garment.The "longer" "runnier" gloppier" the ink is, the less edge detail/crispness it will give you. Because it mushes onto your shirt, it does not shear.The above print speed really only produces an acceptable print on good ringspun garments though. I used a 65/90/65 sharp blade - about 40 lbs pressure 16" wide blade. Angle is about 10 degrees for a bit more opacity. Mesh is 150/54? From Shurelock using their panel frames. Tension is around 30-34 newtons.The standard PC61/Hanes/G200 etc are more difficult to print that fast on and Maintain a clean print with good fiber matte.We almost always will use a roller frame/smoothing screen regardless of shirt type.Here is a flip side to short bodied inks. MOST will also become to soft/pourable/have a large drop in centipose (cP). The more an ink can keep it's original viscosity, the better it can keep it's opacity.This appears to happen more often WITH PRICIER INKS When reviewing, please keep in mind the COST OF THE INK YOU ARE WORKING WITH SF is a very very cheap white. It is made with Economy ingredients. Good economy ingredients, but economy nonetheless.Hope this helps... back to work i go....