If you must use of offset printing, you can use fast Chin-the right amount of ink and padding on the Red dryness due to oil, by guniting powcder method in case the offeris get dirty.

• 若务必拔取胶印，可搁置迟不一油墨并增不收过量的赤燥油，再拔取喷粉的办法以防背后蹭脏。