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.

Coated sur­faces need to be tested for resis­tance to abra­sion caused by a brush, sponge, or other means. The Wet Abra­sion Tester pro­duces a repeat­able, con­trolled con­di­tion to sim­u­late every­day use or wear pat­terns.
The abra­sion tester can examine washa­bil­ity 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
• Air cooled elec­tric motor for max­i­mum reli­a­bil­ity
• 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 test­ing meth­ods for water­borne coat­ing mate­rials 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 Meth­ods

The Wet Abra­sion Scrub Tester is designed to com­ply with four ASTM meth­ods.

ASTM D 2486 The scrub 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.

Abra­sion Scrub Tester

Comes com­plete with:
Abra­sion Tester, 2 abra­sive hold­ers and 2 method spe­cifc abra­sives,
100 scrub test pan­els, peri­s­taltic fluid pump
(excluded for PB-5002, PB-5007 mod­els)

Abra­sion Scrub Tester