Touble shooting | Manufactorer of Screen Printing Machine MINO GROUP.,CO.LTD Comprehensive manufacturer also handling Special ink and Printing Material

All main trouble of screen printing has been listed. Please read when problem occurs.
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	Problem	Highly possible problems in screen printing												Problem in alignment
Cause	●＝Highly possible ○＝Possible ▲＝Slightly possible	Stains occur.	Blurring occurs.	There is some unprintable part.	Vertically-striped pattern occurs.	Some part is doubled.	Printing is unclear	Film thickness is uneven.	Ink does not go through the mesh easily.	Ink on the stencil is scraped unevenly.	Pattern edge is thickened.	Emulsion film is thin.	Emulsion film is thick.	Image is distorted entirely.	Periphery is distorted greatly.	Center is distorted greatly.	Image is elongated.	Image becomes large.	Image becomes small.
Squeegee	The squeegee edge is inappropriate.	●	▲	●	●	▲	○	●	○	▲	●	▲	▲	▲	▲	▲	○
	The squeegee is too hard.	○	▲	●	▲				○			○		▲	○		○	▲
	The squeegee is too soft.	▲	○		▲	▲	○	●	○	○	○		●	▲		○			▲
	The squeegee is not fixed securely.	●	▲	●	▲		▲	○		▲	○	▲	▲	●	●	●	○
	The squeegee rubber is too long.	○	○	○	▲		▲	●		●	▲			●	●		○	●
	The squeegee mounting angle is insufficient. (The squeegee setup is excessive.)			●	▲				●			○				▲
	The squeegee mounting angle is excessive. (The squeegee is laid down excessively.)	▲	○		▲	▲	●			○	●		○		●		○
	The squeegee pressure is too low.			●	○		▲	▲	●	▲		▲		▲					▲
	The squeegee pressure is too high.	●	▲		▲	●	●			○	●	▲	▲	○	●		●	▲
	The squeegee speed is too high.			●	●		▲			▲		●
	The squeegee speed is too low.	▲	○								○		●
	The squeegee pressure is unbalanced.	▲		▲	▲	○	▲	●		○				●	▲	▲	○	▲
Coater	The coater blade mounting angle is improper.	▲	○				●			▲	○		●
	The special coater shape is improper.			●	▲				○			○
	The coater pressure is adjusted insufficiently.	▲	●	▲			▲		▲	○	○		○
	The coater pressure is unbalanced.	▲		▲			▲	●		●	▲	▲	▲
	The ink return is too fast.			▲	▲				○	▲		▲
	The ink return is too slow.	▲	○		○		▲	▲		○	●		○
Stencil frame	The clearance (off contact) between the stencil and substrate is small.	○				●	▲				▲		▲			○			●
	The clearance (off contact) between the stencil and substrate is large.	●		●				▲		▲	○		○		●		●	●
	The peel-off amount is too small.	○				○	●				●		○			▲			▲
	The peel-off amount is too large.			●	▲							▲						▲
	The stencil film (emulsion film) is too thin.			●	▲				▲			●
	The stencil film (emulsion film) is too thick.	▲	●							▲			●
	The stencil frame is warped or distorted.	▲	▲											●	●			▲
	The stencil frame is too small compared with the pattern.	●	▲	●											●		●	●
Stencil	The screen fabric is of poor quality.				▲		▲	○	●	▲	○	▲	▲		▲	▲		▲	○
	The screen is not woven precisely.				○				●	▲
	The tension is low.	●	▲		▲	●	●		▲					○	○	▲	●	●
	The screen is tensioned wrongly.	○			▲	▲	▲			▲				●	●	●	○	○	▲
	The mesh is too fine.			○	▲				●	▲		●
	The mesh is too coarse.	○	●		▲		●	○		▲	●		●
	The screen type is selected by mistake.	○	●	●	▲	▲	▲		●	○	▲	○	○		○	○	●	●
Ink	The viscosity is too high.			●	▲			▲		○	●		●
	The flowability is too high.	○	●		▲		○			●		●
	The ink is agitated insufficiently.	●	●	●	●		○	●		●	○

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From Printing Machine, special ink,material, providing all items form printing. MINO GROUP

MINO INTERNATIONAL LTD.

From Printing Machine, special ink,
material, providing all items form printing. MINO GROUP