PaintSquare.com
      | Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise
  

 

Download our FREE eResource: Specifier's Choice Guide. Get it now.

Problem Solving Forum

| More

January 20 - January 24, 2014

Is it practical to use black light to check for dirt or other foreign matter during surface preparation inspection?

More items for Quality Control


Selected Answers

From Larry Pitre of CBI on January 27, 2014:
In addition to my previous response, ASTM A-380 Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems contains specific details on use of black light for surface inspection:  7.3.2 "Black Light Inspection is a test suitable for the detection of certain oil films and other transparent films that are not detectable under white light. In an area that is blacked out to white light, inspect all visible accessible surfaces with the aid of a new, flood-type, ultraviolet lamp." However, ASTM A-380 also indicates that "The test will not detect straight-chain hydrocarbons such as mineral oils." Use of Black Light for inspection of surface preparation is a useful tool and can be a required step for certain industries.

From Larry Pitre of CBI on January 27, 2014:
Yes, black light is an improved means of detecting invisible contamination on apparently clean surfaces. It is a quick, cheap, effective, and easy method to improve and maintain cleanliness prior to coating products. UV light provides an instant visual check of surface cleanliness; allows for monitoring the effectiveness of cleaning procedures and chemicals; identifies problem areas not cleaned properly, which can then be re-cleaned to the required standard ensuring dirt and chemicals are removed; and trains new and existing staff on how to clean to higher standards.

From M. Halliwell of Thurber Engineering Ltd. on January 24, 2014:
I don’t know that it is a matter of being blind, David, but rather a question of contrast. You can see lint on your clothes under regular light, but it stands out considerably more under blacklight. Perhaps that’s what sparked the question?

From david cuthbertson of savcor on January 22, 2014:
What...Are you blind? Think about why you would use a different light spectrum...Would it be for non-visible contaminants?

Please sign in to submit your answer this question    

Tagged categories: Inspection; Surface preparation


Current PSF Question | Submit a PSF Question | Full PSF Archive

HoldTight Solutions Inc.
NO FLASH RUST - NO CONTAMINANTS

Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802 sales@holdtight.com


KTA-Tator, Inc. - Corporate Office
KTA-Tator
Coatings Inspection

Any structure, any height, any place - A qualified coatings inspector is always available. Call 1-800-245-6379.


SAFE Systems, Inc.
Enduroguard -
The Tough Cable
for a Tough Industry.

Reduce maintenance costs and down time, increase job site safety with Enduroguard Cable. Available exclusively from SAFE Systems. UL listed, flexible, abrasion resistant and cut resistant.


Industrial Vacuum Equipment Corp.
Hurricane Vacuums
& Dust Collectors

Vacuum and dust collector hose, filters and related accessories.
IndustrialVacuum.com


Clemco Industries Corp.
Maximum Dust Suppression Systems Start at $14,950

The system comprises proven technology and equipment with user-friendly flexibility in mind. See it in action.


DeFelsko Corporation
PosiTector SHD Shore Hardness Durometer

PosiTector SHD measures the hardness of non-metallic materials. Features a measurement timer, auto ignore mode and internal memory. Shore A or D available.


Fischer Technology Inc.
NEW PROBE FOR MEASURING TSA THICKNESS

Paired with the PHASCOPE PMP10, Fischer’s new probe is quick and accurate for measuring thermally sprayed aluminum on stainless steel. Click to learn more.


Atlantic Design, Inc.
BUILDING INNOVATION, NOT IMITATION

The smallest version of our Blast Vacuum Recyclers, this ADI 2300CFM 2-Pot is a cleverly designed power package for those smaller jobs. 866.Call.ADI


NLB Corporation
NLB Sure Shroud: Greater Protection and Flexibility

NLB’s Sure Shroud’s lighter weight and flexibility reduces operator fatigue and offers unmatched protection against high pressure hose ruptures. 10k to 40k psi rated.


PSS Industrial Group
AirTech - World Leader in Custom Spray Solutions

AirTech is the solution
for any custom spray application. We have painting & finishing equipment, blast equipment, painting accessories, booth filter and many more items in inventory.

 
 
 

Technology Publishing Co., 2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us