SEC Size Estimation Chart (Transparency) for defects and measuring

Description

Transparency Film Tool
Size estimation charts are useful in a variety of circumstances for accurately measuring spots, inclusions, and defects on different textile surfaces, paper, plastic, etc. Useful in many industries including medical, aviation, printing, optometry and others for quick identification of defects for quality control.  We offer various styles of SEC charts, please look at the features of each version to make sure you purchase what works best for your visual inspection.
Other brand transparency charts may be imaged using a second generation copy from a master negative. (manufactured from an original negative on negative working contact film)  Ours are first generation charts for increased accuracy.  Produced on high dimensionally stable lithographic film, .007 stable base polyester photographic film.  Others in the industry may use thinner, less stable films.  A densitometer is used to calibrate the imaging equipment as well as a certified glass scale and an Edmonson scientific 60 power microscope to measure each image.
GUARANTEE OF ACCURACY
First Generation Film imaged@=>4000DPI. (not a second generation copy from a master negative)
Manufactured with .007 stable base polyester Film
DMIN: 0.05 or less
DMAX: 4.4 or greater
Line Width: .0002 of stated or + / – 10% of stated feature spot size@ print down
Geometric and Scaling Accuracy:  .0015” over 24” @70degreesF/50%Rh
Densitometer is used to calibrate the imaging equipment in production of the film
Bishop Certified glass scale and Edmonson scientific 50 power microscope is used to measure each stated feature.
COC or calibration certificate is not included. These charts are manufactured per the specifications above and are intended to streamline your inspection processes with a quick easy to use visual aid. Certification of these charts is not recommended using equipment or magnification levels beyond their intended use. When manufactured these charts are checked for accuracy with a 50 power microscope. Measurements are confirmed using a scale that measures in half thousandth increments, to a tolerance of half a millimeter.