PAINT & POWDER
– Stress test :
Durability assessment after the application of 10 dyes and their subsequent cleaning operations with a chemical product for 15 cycles . The maximum value of 100 ( i . e . complete colour removal ) has always been reached .
Summary table of the results of the stress test carried out by German association Gütegemeinschaft Anti-Graffiti e . V .
L *
a *
b *
Reflectometer value
Initial condition
89.35 ( 0.33 )
0.25 ( 0.04 )
3.39 ( 0.29 )
144 ( 5 )
Colour
Gloss
Measurement 2 hours after the first cleaning
90.14 ( 0.55 )
-0.02 ( 0.13 )
2.96 ( 0.33 )
143 ( 5 )
Measurement 2 hours after the 15th cleaning
90.48 ( 0.45 )
-0.01 ( 0.10 )
2.87 ( 0.31 )
144 ( 5 )
4 . Tests carried out according to the set of rules of the London Underground .
– Eight graffiti signs ( including leather dyes , which are much more difficult to remove than inks and spray paints ) are applied and left in contact with the surface for a period of 72 hours . After elimination , graffiti removal effectiveness and surface damage are assessed . The application and removal cycle is repeated for 14 times . The acceptability criterion is that the overall graffiti removal score is greater than 13.0 , with excellent ( 16.0 ) or very good ( 13.0 - 15.9 ) results .
– ADAPTA Anti-Graffiti HCR achieved an overall performance score of 14.0 “ Very good ” and 16.00 “ Excellent ”, excluding leather dyes . The powder paint causes the application of markers and leather dyes to create a stagnation of the ink / dye due to surface tension . It should be noted that this effect also represents a deterrent for vandals . Moreover , since there is no penetration inside the surface , the graffiti is easier to remove . The liquid graffiti removal agent also stagnated on the surface . This resulted in the ink / dye ’ s reduced tendency to re-deposit in the coating and further mark the surface .
Contact angle |
100
( 2.1 )
|
96.9
( 3.9 )
|
82.7
( 3.9 )
|
Evaluation tables of the test performed according to the rules valid for the London Underground . |
OVERALL GRAFFITI REMOVAL SCORE CLASSIFICATION
Fig . 5
– Functional test after the application of inks for markers .
Functional assessment after application and subsequent removal of 60 predefined marker inks . Out of the 60 colours , in no case were there any shades of tint left after cleaning . This corresponds to a success rate of 100 %.
16.0 |
Excellent |
15.9 - 13.0 |
Very Good |
12.9 - 11.0 |
Good |
10.9 - 7.0 |
Fair |
6.9 - 4.0 |
Poor |
Under 4.0 |
Very Poor |
Fig . 7
Fig . 6
Panels for the functionality test with inks for markers performed by Gütegemeinschaft Anti-Graffiti e . V .
Conclusions
In conclusion , the new powder coating ADAPTA Anti-Graffiti HCR has shown excellent performance in terms of graffiti removal effectiveness and absence of surface damage after elimination . Above all , it has proven to be a valuable deterrent to vandalism itself , since the surface tension created on the coated structures makes writing with markers or painting with aerosols particularly difficult .
Thanks to ADAPTA ’ s Anti-Graffiti HCR , society now has a highly effective , low environmental impact graffiti prevention tool ( powder coatings do not generate any VOC emissions ), which can also give the treated structures an excellent aesthetic value thanks to the numerous combinations of colours , effects , textures , and opacity degrees .
For further information : www . adaptacolor . com
70 OCTOBER 2020 read online : www . surfaceworld . com