Liquid solu­tions are pumped to the brush heads from the detach­able con­tainer mounted to the side of the tester. The pump may be switched on or off dur­ing the course of test­ing, and the flow can be adjusted for pre­cise dos­ing.

Abra­sion Resis­tance Tester

Used to test scrub abra­sion resis­tance of coated sur­faces caused by a brush, sponge, or other means.  The Wet Abra­sion Resis­tance Tester pro­duces a repeat­able, con­trolled con­di­tion to sim­u­late every­day use or wear pat­terns.
The abra­sion tester can examine washa­bil­ity, scrub abra­sion, and related prop­er­ties that affect the stain resis­tance of coat­ings. Deter­gent per­for­mance test­ing can also be deter­mined in a repro­du­ci­ble man­ner.

• Fea­tures two brush hold­ers for side by side test­ing
• Peri­s­taltic fluid pump – no rea­gent con­tam­i­na­tion (except for PB-5002, PB-5007)
• Five digit pre­set coun­ter – acti­vates the machine for pre­set num­ber of strokes, then switches off
• Can be mod­i­fied to meet DIN, ISO, or ASTM scrub abra­sion and washa­bil­ity test meth­ods

DIN ISO Meth­ods
The Stan­dards EN ISO 11998 and DIN EN 13330 (replaced DIN 53778) describe pro­ce­dures to eval­u­ate the resis­tance of coat­ings against abra­sion by clean­ing or scrub­bing the sur­face. The coat­ing is applied on a foil and dried under stan­dard con­di­tions. In order to describe the clean­a­bil­ity, defined pol­lu­tions are applied onto the sur­face before start­ing the test. 

DIN 53 778 (*with­drawn 08/2007): Dis­per­sion Paints
Clean­a­bil­ity: Test area should be free of pol­lu­tions
Wash resis­tance: Eval­u­a­tion after 1000 scrub cycles
Scrub resis­tance: Eval­u­a­tion after 5000 scrub cycles
The test is per­formed wet using a hog bris­tle brush and a pump to apply the wash­ing liquid. The eval­u­a­tion is done visu­ally.

ISO 11998
The ISO test method describes a short ver­sion of the scrub abra­sion test. This test uses "3M Scotch Brite 7448" pads and the wash­ing liquid is man­u­ally applied before start­ing the test. The test is fin­ished for eval­u­a­tion after 200 scrub-cycles.  The eval­u­a­tion of the wash/scrub resis­tance is done by cal­cu­lat­ing the loss of mass.

DIN EN 13300
This stan­dard describes the vari­ous abra­sion test meth­ods for water­borne coat­ings and coat­ing sys­tems for inte­rior walls and ceil­ings. One qual­ity cri­te­rion men­tioned is the wet abra­sion resis­tance tested in accor­dance to EN ISO 11998. Addi­tio­n­ally, a rat­ing scale depen­dent on the amount of abra­sion is used for final clas­si­fi­ca­tion.

ASTM Abra­sion Test Meth­ods
The Wet Abra­sion Resis­tance Tester is designed to com­ply with four ASTM meth­ods.

ASTM D 2486
The scrub abra­sion resis­tance of inte­rior wall paint is the pri­mary pur­pose of this method.  The paint is applied to a black plas­tic panel and allowed to cure.  The panel is scrubbed with a nylon bris­tle brush until fail­ure occurs.  An abra­sive scrub media is used to accel­er­ate the test.   

ASTM D 3450
This test method deter­mines the ease of remov­ing soi­lant dis­col­o­ra­tion from inte­rior coat­ings.  The coat­ing is draw­down on a black plas­tic panel and allowed to dry for seven days.  A spe­c­i­fied soi­lant medium is applied. The coat­ing is scrubbed with an abra­sive or non-abra­sive media using a cel­lu­losic type sponge for 100 cycles.  The soi­lant remo­val is assessed by mea­sur­ing the CIE Y reflec­tance before and after the test. 

ASTM D 4213
The pur­pose of this method is to mea­sure scrub resis­tance.  The pri­mary dif­fer­ences from ASTM D 2486 method are: The scrub resis­tance is deter­mined by weight loss of the paint film rel­a­tive to a stan­dard cal­i­bra­tion panel.  The test panel and cal­i­bra­tion panel are scrubbed simul­ta­ne­ously. The scrub­bing device is a Scotch-Brite™7448 abra­sive pad.

ASTM D 4828
This test method deter­mines the rel­a­tive ease of remov­ing soil and stains from inte­rior coat­ings.  The coat­ing is applied to a black plas­tic panel and dried for seven days. The soi­lant can be user defined or the soi­lant described in ASTM D 3450 can also be used.  A user defined liquid or pow­der cleaner is applied.  The panel is scrubbed 100 cycles with a sponge.  The soi­lant remo­val is assessed using gloss or color mea­sure­ment.