Crockmeter supplier in Bangladesh

Tell us the rubbing methods your buyers name and how many tests you run a day. As a crockmeter supplier in Bangladesh, Roptan sources the right tester and its accessories, checks the datasheet against the method, and delivers to your lab.

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Buying crockmeters in Bangladesh

A crockmeter is a rub tester: a covered finger rubs a dyed or printed specimen, and colour moved onto white cotton cloth is graded on the staining grey scale. In one Gazipur mill lab studied by students, the crockmeter ran ten cycles in ten seconds at 9 N, and the lab's other listed test equipment was imported. The 342 dyeing, printing and finishing facilities USDA counted from BTMA data include its buyers.

A crockmeter that looks right can still fail an audit: a weakened load, a worn finger, or a wet test run to the wrong method. A crockmeter supplier in Bangladesh should check all three. Roptan sources from verified sellers, checks finger, load, stroke and accessories against your methods, asks who calibrates the unit here, and delivers. You deal with Roptan only.

Kinds of crockmeter

Hand-cranked crockmeters

The operator turns a handle to drive the finger back and forth. One maker says they suit smaller setups that run a few tests at a time.

Motorised crockmeters

A motor drives each stroke, which keeps the speed even and spares the operator, and a counter records the cycles. One maker advises one for labs that test dozens of specimens a day.

Rotary vertical crockmeters

For prints and areas too small for the linear tester, under ISO 105-X16:2016 or AATCC TM116, which AATCC describes as technically equivalent. Choose one if you test small printed areas.

Linear testers with a pile finger

ISO 105-X12 also covers pile fabrics and floor coverings; a trade explainer says it uses a rectangular 19 by 25.4 mm finger for pile. Choose it for pile fabrics.

How to brief a crockmeter supplier in Bangladesh

Methods: ISO 105-X12, AATCC TM8, or both. European buyers are said to use ISO and US buyers AATCC; Bangladesh sells to both, so a lab may need both.
Finger, load and stroke: For non-pile fabrics, the datasheet should show a 16 mm round finger and a 9 N downward force for either method, and 104 mm travel (tolerance 3 mm) for ISO 105-X12.
Cycles: Usually ten cycles at about one a second, with a resettable counter that shows them.
Wet rubbing: ISO 105-X12 wets the cloth more than AATCC TM8, so one fabric can grade lower on the ISO wet test. Sources differ on the pick-up; take it from the method.
Accessories: Verification cloth, an in-house poor crocking cloth for checking the lab, a specimen holder, white blotting paper and spare fingers.
Test room: Specimens and rubbing cloth are usually conditioned in the ISO 139 standard atmosphere before testing. Dhaka averages 82 to 83 percent relative humidity from June to September, so the room usually needs humidity control.

Rubbing fastness standards

ISO 105-X12:2016: The ISO rubbing method for textiles of all kinds, pile included, dry and wet. Confirmed in 2021 and now under systematic review, so a new edition could follow.
AATCC TM8-2016e(2022)e: The US crockmeter method, dry and wet with water. It is not recommended for carpets, or for prints where the test area is too small.
ISO 105-X16:2016 and AATCC TM116: Rotary rubbing for areas too small for the ISO 105-X12 apparatus, with the two methods described as technically equivalent.
ISO 105-F09 and ISO 105-A03: F09 specifies the cotton rubbing cloth; A03:2019 is the staining grey scale that grades it. AATCC TM8 also allows the chromatic transference scale.

What moves the price of a crockmeter

Drive: a hand-cranked frame, or a motorised unit with its own controls.
Counter: the cycle range it records, 0 to 999 on one listing and 0 to 9,999 on another.
Paperwork: a calibration record for load and stroke at commissioning, and who issues it.
Kind: a linear tester, a rotary unit for prints, or a pile finger as an extra.
Kit and make: verification cloth, holder and spare fingers in the box, and the maker.

Lead times and delivery

Crockmeters are sold in Dhaka, but some listed models show as unavailable at times. A common hand-cranked model may be ready quickly; a motorised or rotary unit, a pile finger or a calibration record arranged before delivery can add time. Roptan confirms the dates in the quote.

Roptan delivers to your lab anywhere in Bangladesh. The crockmeter is a benchtop machine needing a firm, level bench in the conditioned room; one motorised model is 540 by 390 by 245 mm and 21 kg. The seller sets it up, and we ask for a calibration record at commissioning, handed over with the manual and a VAT invoice (Mushak 6.3).

What we check for this order

Datasheet against the methodWe check finger size, load, stroke length and cycle count on the datasheet against each method your buyers name.
Load and fingerWe confirm at handover that the 9 N load has not weakened and the finger shows no scratches or uneven wear.
Complete kitWe check that the verification cloth, specimen holder and spare fingers come with the machine, not as a later order.
Calibration routeWe ask the seller who calibrates force and stroke in Bangladesh and against what traceable reference, and get the answer in writing.

Questions buyers ask

Why does our wet rub grade differ from the buyer's lab?

Often the methods differ. ISO 105-X12 wets the rubbing cloth more than AATCC TM8, so the same fabric can grade lower on the ISO wet test, and sources differ on the exact pick-up figures. Read them from the method text, wet the cloth with distilled water, and confirm which method the buyer reports.

Can one crockmeter test prints and pile fabrics?

Not always. A linear tester with a 16 mm finger serves flat dyed and printed fabric. Prints too small for it go on a rotary tester to ISO 105-X16 or AATCC TM116, and ISO pile testing uses a rectangular finger. Floor coverings have their own US method, AATCC TM165.

How do we keep a crockmeter accurate?

One maker lists three habits: check that the 9 N push has not weakened, since a weak load passes bad fabric; inspect the rubbing finger weekly for scratches or uneven wear; and have a competent person calibrate it before audits.

How many rubs does a test take?

Usually ten cycles at about one a second, on a 50 by 50 mm square of white cotton cloth: one square dry, another wet with distilled water. Follow the method your buyer reports, and grade the cloth on the staining scale.

How soon will I hear back about textile testing and colour lab?

Within 48 hours of a complete requirement, with a price and a delivery date. A requirement is complete when it has the quantity, where it is needed and by when.

Who do I deal with?

With Roptan, when Roptan manages the order: we buy from the verified seller and deliver to you. With the supplier directly, when you post on the requirement board and choose a quote yourself.