Solvent Removable/Acid Etch Resist

CM-34449 is an asphaltum based acid etch resist applied by screen printing and removable by solvent application. Excellent resistance to a wide range of etchants. CM-34449 is an asphaltum based acid etch resist designed to withstand etchants such as hydroflouric acid, cupric chloride, ferric chloride, ammonium persulfate, and other etchants used in the substractive chemical etching process.

 

Product Range

 
Black* CM-34449
Reducer CMN-4
Retarder CMN-7
 


CM-34449 is only available in black and is a stock product.

Please contact your Cudnor & O'Connor technical representative for information on other applications

*Heavy metal compliant by CONEG legislation, ASTM F963-03, EN71-3 1994 and IS 8124-3: 1997

 

QT-SCR Rev B

Substrates
 

Glass and Metal

 

Drying

 

CM-34449 dries by solvent evaporation; methods employed are:

1) Ambient air/racking: 30-45 minutes, depending on air movement and general ambient conditions. Drying panels in the vertical or diagonal position accelerates solvent drop-off.

2) Forced Air-"Jet" dries in seconds with efficient conveyorized units producing 3000-5000 cfm with temperature settings of 120 - 160°F

3) Convection/Batch Oven: Moderate temperataures with continual air exchange. If panels are racked in the horizonal position, care must be taken to ensure complete cure of panels positioned on center trays.

 

Removal

After chemical processing, the resist is removed using aromatic, aliphatic, chlorinate and ketone organic solvents. Removal is effected by immersion or spray applicatoins of organic solvents.

 

Screening

110 ot 260 mesh counts in monofilament polyester fabric. Stainless steel fabric can also be used.

 

Squeegee

60 to 80 durometer.

 

Stencils

Cudnor-Cote Direct Emulsion. Indirect Photo Films and Capillary

 

Modifiers

Reducer: CMN-4 is recommended and should also be used in moderation (2-5%)

Retarder: During hot and humid conditions CMN-7 retarder is recommended. Reducer and retarder additions should be measured by weight.

 

 

 

 

 

 

Note: Information contained in Cudner & O'Connor printed matter is based on laboratory and field tests. Because we cannot control actual production conditions, no warranty is expressed or implied. Careful testing is always recommended prior to production. Consult our Technical Service Department on all application issues.

CANDOC is a trademark of Cudner & O'Connor Company. All other products mentioned are registered trademarks or trademarks of their respective companies.

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Last modified: Tuesday June 25, 2007 .