What is a blotter test?

What is a blotter test?

Used to determine the presence of oil, water, or other contaminates in compressed air used for blast cleaning and coating application. Simply attach a piece blotter paper to a rigid backing using tape and perform the test accoridng to ASTM D 4285.

What is ASTM D4285?

ASTM D4285 – 83(2018) Standard Test Method for Indicating Oil or Water in Compressed Air.

What is the disadvantage of seed testing?

Requires specialized training and experience. Test is usually more laborious and tedious to perform than a germination test. Test results do not reflect fungal infection or chemical damage.

What is the ASTM d4285 standard test method?

Active Standard ASTM D4285 | Developed by Subcommittee: D33.05 Book of Standards Volume: 06.02 2.1 Clean compressed air is required to prevent contamination of coating materials and surfaces being prepared for coating. This test method is a visual examination technique for determining oil or water in compressed air.

How does the ASTM D 4285 blotter test work?

The ASTM D 4285 requires the absorbent paper mounted on the rigid backing, and the test to be conducted on the discharge point close to the use point, also the test should be done after inline oil and water separators. The testing intervals is specified on the coating specification. Air Compressor Blotter Test Acceptance Criteria

How to do a blotter test for compressed air?

Place the absorbent paper in the air flow of the compressor for few minutes and then look for any visible oil and water. The ASTM D 4285 requires the absorbent paper mounted on the rigid backing, and the test to be conducted on the discharge point close to the use point, also the test should be done after inline oil and water separators.

What’s the standard test for indicating oil in compressed air?

ASTM D4285-83 (2018), Standard Test Method for Indicating Oil or Water in Compressed Air, ASTM International, West Conshohocken, PA, 2018, www.astm.org