Heidelberg SM74
- Thread starter Rabin
- Start date
CHOCK
Senior Member
Cause:
1. Low alcohol (or alcohol substitute)
content in dampening system
2. Glazed blanket, ink rollers or
dampening rollers
3. Excessive printing pressure
4. Ink body too greasy, spreads into
non-printing areas
5. Plate improperly processed or
exposed to light
6. Fountain solution highly bichromated
7. Ink too soft
8. Improper pH of fountain solution
9. Improperly set or worn dampening
rollers
10. Ink rollers overheated
Solution:
1. Adjust to proper alcohol concentration
2. Clean blanket and rollers thoroughly and
recondition to manufacturer specifications
3. Reduce printing pressure to proper levels
4. Make sure ink is on-standard; consult ink
manufacturer to reformulate ink if necessary
5. Desensitize or re-make plate; adjust plate
making process
6. Adjust fountain solution to proper
pH/conductivity (pH 4.0-4.5)
7. Consult ink manufacturer for stiffer ink
8. Adjust fountain solution to proper
pH/conductivity (pH 4.0-4.5)
9. Adjust rollers to proper pressure; replace
cover if necessary
10. Check for worn bearings and replace if
necessary; adjust roller pressure
Blessing
1. Low alcohol (or alcohol substitute)
content in dampening system
2. Glazed blanket, ink rollers or
dampening rollers
3. Excessive printing pressure
4. Ink body too greasy, spreads into
non-printing areas
5. Plate improperly processed or
exposed to light
6. Fountain solution highly bichromated
7. Ink too soft
8. Improper pH of fountain solution
9. Improperly set or worn dampening
rollers
10. Ink rollers overheated
Solution:
1. Adjust to proper alcohol concentration
2. Clean blanket and rollers thoroughly and
recondition to manufacturer specifications
3. Reduce printing pressure to proper levels
4. Make sure ink is on-standard; consult ink
manufacturer to reformulate ink if necessary
5. Desensitize or re-make plate; adjust plate
making process
6. Adjust fountain solution to proper
pH/conductivity (pH 4.0-4.5)
7. Consult ink manufacturer for stiffer ink
8. Adjust fountain solution to proper
pH/conductivity (pH 4.0-4.5)
9. Adjust rollers to proper pressure; replace
cover if necessary
10. Check for worn bearings and replace if
necessary; adjust roller pressure
Blessing
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