The Tooke Paint Inspection Gage can direct measurement of total coating thickness and thickness of individual coats of paint. It features a Dual-Measure scope, with 1 mil per hashmark space above the line and 20 microns below the line scale. Thus, in addition to routine use, it often serves as a “referee” instrument to calibrate indirect or non-destructive thickness measuring instruments.
Dual-Measure Scope, 1 mil per hashmark space above the line and 20 microns below the line scale.
Other uses include assessment of substrate conditions and coating adhesion, and direct observation of microscopic cracking, tendency for brittleness, blistering, cratering, or other microscopic film symptoms.
Measures Thickness of Coatings Applied to Wood, Plastic, Cement, Glass, Ceramics, Mirror Backings, Metal, Etc.
Assists in Measuring Brittleness and Adhesion of Coatings and Materials.
Models OG212 & OG214 are supplied with 1X, 2X, & 10X cutting tips installed in the gauge body. The 2X tip is shown extended to working position. An optional 5X cutting tip is available.
Gauges come in a rugged plastic carrying case with cutting tip wrench, indelible marker, spare LED bulb, and spare batteries.
The body holds the microscope and lamp batteries as well as the groove-cutting tungsten carbide cutting tips mounted on the narrow side.
The OG212 body is made of machined and anodized aluminum.
The OG214 gauge body is made of injection molded high-impact plastic.
The tripod formed by the two guide studs and the extended / operable cutting tip provides for precise alignment of the cutting tip with the coating surface to be incised.
A lanyard and keeper looped through the body secure the instrument to the inspector’s wrist.
A plastic (polypropylene) carry case with foam inserts to carry your Tooke Gage and spare parts: marker, wrench, LED bulb, and spare batteries.
The entire unit is designed for convenience and completeness in field inspection tasks.
Original factory/OEM calibration of the optics is performed on all gauges when assembled. If OEM certification is desired, it can be ordered at additional cost. Repeat calibration with certification is also available, call for details. Checks are also made with precision applied film standards. For highest precision work, the user is advised to maintain painted panels of known thickness, and to check and calibrate the instrument measurements periodically.
The Tooke Gage Gauge has been used to assess sandblast cleaning work, to measure plating and paint thickness on ceramics, metal, wood, and concrete, and even to measure protective backing thickness on mirrors. It is virtually the only tool for measuring paint on plastics.
Tooke Gages produced after November 2019 now have the new, custom-designed, custom-manufactured Dual-Measure scope and reticle. Tooke Gages produced between June 2010 and November 2019 are fitted with the “universal” reticle. The universal scope can be swapped out for the new Dual-Measure scope: contact Gardco for information.
|Increment (Hash Mark) Chart - English/Metric|
|The discontinued "universal" scope conversion.|
Note that this table applies ONLY to the discontinued "universal" scope, and not to the new Dual-Measure scope.
Calculating your coating depth as above, using counted hashmarks of the cut-width, visualized through the "universal" scope, each hashmark for the three main cutting tips will equal:
|Mils||2 (1.97)||1 (.984)||.2 (.197)|
|Microns||50 (50.0)||25 (25.0)||5 (05.0)|
|Millimeters||.05 (.050)||.025 (.025)||.005 (.005)|
"A Paint Inspection Gage" by Raymond Tooke, Jr., OFFICIAL DIGEST, July 1963, 35, pp. 691-698.
"Coatings Adherence Measurement By An Angular Scribe-Stripping Technique" by W. R. Tooke, Jr. and J. Montalvo, JOURNAL OF PAINT TECHNOLOGY, January 1966, 38, pp. 18-28.
"Development of Specifications For Measurement of Paint Thickness On Structural Steel" by J. D. Keene and T. L. Shoemaker, JOURNAL OF PAINT TECHNOLOGY, 45, No. 585, October 1973, pp. 46-67.
"How Instruments Boost Coatings Application Productivity" by W. R. Tooke, Jr., PROFESSIONAL DECORATING AND COATING ACTION, October 1976, pp. 16,18.
"Standard Method of Measurement of Dry Film Thickness of Protective Coatings Systems by Destructive Means", Designation: D4138-82, 1988 ANNUAL BOOK OF ASTM STANDARDS, pp. 695-697.
"Method and Device for Measuring the Thickness of Films" by W. R. Tooke, Jr.
ASTM D4138-82; ISO 2808
Suggestions to Users
OG212 - Complete 3 cutting tips (1X, 2X and 10X), plastic carry case, spare LED bulb, 2 batteries, a tip wrench and an indelible marker.
OG214 - Complete 3 cutting tips (1X, 2X and 10X), plastic carry case, spare LED bulb, 2 batteries, a tip wrench and an indelible marker.