PTA Group - Paper Testing Association
for Paper and Board
Determines the folding resistance of paper, according to the Louis Schopper principle
Standard device designed for security papers
Automatic stop after sample break
Standard version for paper up to 0.25 mm thickness, alternatively available for board
Measurement and display of the folding head temperature optionally available
Paper Testing Instruments
Applicable standards:
ISO 5626
NF 003-062
NF ISO 5626
PTA Group - Paper Testing Association
Code: F13505
The device measures the number of folds until the sample
breaks. The test requires that two samples be tested simul-
Test description
Two samples are clamped in the folding heads for a simulta-
neous test. The spring supported sample supports are pulled
apart, so that the samples are clamped at the specified force.
After pushing the start button, the folding knives begin to
guide the sample around the sapphire supported folding
rolls. That way, the samples are folded on both sides at a ra-
dius of 0.25 mm. If one sample breaks, the folding process of
Folding head with sample the second sample continues until it breaks too. The move-
ments of the folding heads stop after test termination, so that
the samples can be removed. The device records and displays
the number of folds until the sample breaks.
Versions: papers up to 0.25 mm thickness / boards
* Spring force min. 7.55 N / max. 9.81 №
* Testing length: 90 mm
* Sample length: 100 mm
* Sample width: 15 mm
* Speed: 150 strokes/min
* Digital display with statistic functions
* RS 232 interface for result transfer
* Compatible with MiniStat and PaperLIMS
* Optionally available with temperature sensor for
Folding head with tempearature sensor temperature deviation measurements
Paper Testing Instruments
230 V, 50 Hz
Electricity or 110V, 60 Hz
(specify when ordering)
Water supply None
Compressed air None
Dimensions (WxDxH) 53x49x34 cm
Net weight 50 kg
Gross weight 80 kg
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