| Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise


Learn while you earn.

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

Fischer Technology Inc.
DUALSCOPE®FMP100 with DataCenter IP

Transfer customized inspection plans from PC to FMP100 using step-by-step guidance with prompts and pictures throughout the measurement procedure

KTA-Tator, Inc. - Corporate Office
KTA Online
Instrument Catalog

• Any Manufacturer
• Any Instrument
• Any Time
Or call 800-582-4243

DeFelsko Corporation
PosiTest Automatic Adhesion Tester

Electronically controlled hydraulic pump applies smooth and continuous pull-off pressure at user selectable rates. No twisting, pumping or cranking.

Clemco Industries Corp.
Powerful Protection in a Small Package

Mounts inside blast helmet, alerts operator to dangerous breathing-air condition by audible, visual, and vibratory alarms. Easily calibrated, battery operated.

Atlantic Design, Inc.

what we did to this machine! Let ADI upgrade your machine, extending the life, efficiency, and value. Any make. Like new, but better! 866.Call.ADI

Novatek Corporation
Dustless Coatings Removal

Strip it, clean it, and profile it,
all dust free! High production
rates and Blast like finishes.
Comply with new lead

Industrial Vacuum Equipment Corp.
Hurricane Vacuums
& Dust Collectors

Vacuum and dust collector hose, filters and related accessories.

CS Unitec
Peening Preparation Tools

CS Unitec’s hand-held scarifiers are an ideal alternative to small-area shot blasting for cleaning and preparing concrete & metal surfaces.

Elcometer, Inc.
Elcometer 266
DC Holiday Detector

Easily Finds Pinholes, Flaws & Thin Spots; Safer, More Reliable Testing; Voltage-Adjustable Keypad; Dual-Safety Switch On Handle.

International Paint/AkzoNobel
New! Chartek

The next evolution in passive fire protection has arrived! Check out our new line of Chartek products.

Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design 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   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us

© Copyright 2000-2015, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail