info@idmtest.com · T. (+34) 943 571 670
16 july 2026


At IDM Test, we are committed to innovation and research into materials and machinery; we focus on expanding our range of equipment in order to provide solutions to the various challenges we may encounter in the paper and pulp industry.
Today we are presenting the new and improved design of the DDT Dynamic Drainage Tester (JD-BJAR), a testing machine that determines the retention and drainage of paper pulps, using the ‘BRITT JAR TESTER’ system in accordance with the TAPPI T261 standard.
A simple and easy-to-use piece of equipment to assist us in the evaluation of paper, drainage, and the adhesion of dust, fibres and fines.
It features a touchscreen for running the test, either in automatic or manual mode.

We have attached the technical specifications, which also set out its features in detail.
