2201 - RETROREFLECTIVE SHEETING
2200-2 When more than 25% of the signs within a lot fail to comply with the requirements, replace all signs made
from that lot. 2201.4 PREQUALIFICATION Manufacturers desiring to provide material under this specification are to submit prequalification samples of each type, class and color covered by this specification which they wish to pr equalify. Each sample consists of 3 pieces 24 inches square. Forward the prequalification samples to the Engineer of Tests. Samples will be tested for compliance with all requirements of this specification. Each Manufacturer will be notified of the test results. If the prequalification samples of retroreflective sheeting comply with this specification, the product will be placed on a list of prequalified products maintained by the Bureau of Constructi on and Materials. No retroreflective sheeting will be used on KDOT projects unless it has been prequalified. Testing and evaluati on by KDOT may be waived if complete testing has been performed on th e identical product by AASHTO National Transportation Product Evaluation Program (NTPEP) within the last five years. Forward an official copy of the test report along with evidence that the product referenced is identical to that submitted fo r prequalification, to the Engineer of Tests for evaluation. 2201.5 TEST METHODS All tests will be conducted in accordance with ASTM D 4956 with the exception of artificial we athering. Artificial weathering will be conducte d according to ASTM G 155, Cycle 1, with the following additions and exceptions: At the end of each 20 hour cycle, the panels will be placed in a cold ca binet at approximately 0°F for one hour. After removal from the cold cabinet, panels will be returned to the weatherometer to await the start of the next cycle. 2201.6 BASIS OF ACCEPTANCE
a.Permanent Sheeting.
1.Prequalification as required by subsection 2201.4 .
2.Satisfactory results of tests conducted at MRC. Each lot of sheeting will be sampled at destination by a representative of KDOT and will be subject ed to a visual examination and tested for physical properties as necessary to verify that the sheeting complies with this specification.
3.Receipt of the warranty certification as specified in subsection 2201.3 by the Project Engineer.
b.Temporary Sheeting. Retroreflective sheeting used to manufacture temporary traffic control signs will be accepted on the basis of a certification prepared by the contr actor stating that the retror eflective sheeting used to manufacture the signs was prequalified unde r this specification, and visual insp ection by the Engin eer for condition and other requirements. 2202 - IMAGE SYSTEMS FOR RETROFLECTIVE SHEETING
2200-3 Section 2202
IMAGE SYSTEMS FOR RETR OFLECTIVE SHEETING 2202.1 DESCRIPTION This specification covers Process Inks, Electronic Cuttable Films, and Digital Print for use on retroreflective sheeting. 2202.2 REQUIREMENTS
a.General. Provide transparent or opaque process inks with reducers and thinners as required for proper application. Provide durable, transp arent or opaque, colored electronic cuttable films with a pressure sensitive adhesive and a removable liner. Provide digital print on Ty pe XI retroreflective sheeting. Provide materials that are suitable for processing legends, borders, and background colo rs on retroreflective sheeting. Provide process inks or electronic cuttable films in 2 types as follows: Type I - For use with Type I retroreflective sheeting. Type High Intensity - For use with all type s of High Intensity retroreflective sheeting.
b.Color. Provide transparent inks, films, and digital print that are yellow, red, orange, green, blue, or brown. Opaque ink, film, or digital print is black. Provide colors that comply with the chromaticity limits in ASTM D 4956 .
c.Performance. Provide process inks, electronic cuttable films, and digital print that, when applied according to the manufacturer’s recomme ndations, comply with the following:
1.They are compatible with the retroreflective sheeting.
2.They have good adhesion to the sheeting and do not cause blistering, puckering, shrinkage, expansion or other deterioration of the sheeting.
3.After artificial weathering, they have a "good" or better colorfastness, and show no evidence of cracking, edge lifting, curling or other surface deterioration.
4.Process inks dry hard within 16 hours. 2202.3 TEST METHODS All tests will be conducted in accordance with ASTM D 4956 with the exception of artificial weathering. Artificial weathering will be conducted according to AS TM G 155, Cycle 1, with the following additions and exceptions: At the end of each 20-hour cycle, place the panels in a cold cabinet at approxi mately 0ºF for 1 hour. After removal from the cold cabinet, return the panels to the weatherometer to await the start of the next cycle. 2202.4 PREQUALIFICATION Manufacturers desiring to provide material under this specification are to submit prequalification samples of each type and color covered by this specification that they wish to prequalify. Each sample of process ink consists of 1 quart of transparent and opaque inks and any necessary reducer or thinner required for proper application. Each sample of electronic cuttable film and digital print consists of 2 pieces 24 inches square. Supply a sufficient quantity of the correct type of re troreflective sheeting for ink or film applications. Directions for proper application to retroreflectiv e sheeting must accompany all samples of ink or film. Forward the prequalification samples to the Engineer of Tests. Samples will be tested for compliance with all requirements of this specification. Each manufacturer will be notifie d of the test results. If the prequalification samples of ink, film, or digital print comply with this specification, the product will be placed on a list of prequalified produc ts maintained by the Bur eau of Materials and Resear ch. No ink, film, or digital print will be used on KDOT projects unless it has been prequalified. Manufacturers will be required to requalify at intervals determined by the Engineer of Tests. 2202 - IMAGE SYSTEMS FOR RETROFLECTIVE SHEETING
2200-4 Testing and evaluation by KDOT may be waived if complete testing has been performed on the identical
product by AASHTO National Transportation Product Evaluation Program (NTPEP) within the last five years. Forward an official copy of the test report along with evidence that the product referenced is identical to that submitted for prequalification, to the Engineer of Tests for evaluation. 2202.5 BASIS OF ACCEPTANCE Prequalification as required by subsection 2202.3 . Receipt and approval of a Type C certification as specified in DIVISION 2600 . Visual observation of performance.
Source: Kansas Standard Specifications for State Road and Bridge Construction, 2015 Edition. Pages 906–908 of 978.