Quality standards of imabari towel brand products

All the towels produced in Imabari are not labeled "Certified imabari towel products" Only products meeting certain strict criteria are labeled "Certified imabari towel".

Test Items Test Methods Judgment Standards
Characteristics of Towel Absorbency JS-L1907 / Sedimentation Within 5 seconds(Must pass both before being washed and after being washed three times)
Rate of thread removal
JS-L0217 / "How to wash: Rule-137"(Towel Examination Rules) Piles: less than 0.2% Non-twisted threads: less than 0.5% Shirring: less than 0.4%
Pile retention strength (Towel Examination Rules) More than BT・KT 2.45 cN / pile More than FT・WT 2.16 cN / pile
Strength of dye Resistance to light JIS-L0842 / Carbon Arc Method More than 4 degrees (More than 3 degrees for pastels and vivid colors)
Resistance to being washed JIS-L0844 / A- No.2 Method More than 4 degrees for discoloration  More than 4 degrees for stains
Resistance to sweat JIS-L0848 More than 4 degrees for discoloration More than 3-4 degrees for stains
Resistance to friction JIS-L0849 /(Type Ⅱ) More than 4 degrees for dryness More than 2-3 degrees for moisture (For dark colors and pigment coloring, 0.5 degrees below the levels mentioned above)
Strength of towel cloth Strength to withstand being pulled out JIS-L1096 (Rule A) / (Labeled-Strip-Rule) More than 147N for length More than 196N for width
Tensile strength JIS-L1096 (Rule A) / Mullen Form-Rule

More than 392.3KPa

Size change rate LIS-L1096 (Rule G) / By electric washing machine Within 7%
Rolled edge section slip resistance JIS-L1096 (Towel Examination Rules)
Slip-resistant pin hooking method
Lengthwise: 20 N or more
Widthwise: 30 N or more
Organic substance Formaldehyde content Health & Welfare Ministry- Rule No. 34
Acetylaceton Rule
Less than A-A0 0.03

  • Absorbency testing is carried out regardless of material. Even if the product fails sedimentation testing, a result of 1 second or less on the liquid dropping tests (tested twice: once before it has been washed and once after it has been washed three times) means the material has passed. For pigment-colored products, a Certificate of Pigment Coloring Area Ratio must be submitted. The washing method for absorbency testing entails washing three times followed by drying in a clothes dryer.
  • Thread removal rate testing for processed products (with the exception of pile, non-twisted threads and shirring), and for non-cotton products, is carried out by an independent testing organization. This independent organization reports test results to us, and through joint deliberation we make a pass/fail determination together.
  • For handkerchiefs, products with gauze backing, and towel-fabric scarves, pile retention strength testing is carried out according to testing method JIS-L1075 Rule B (pile retention strength testing), with conditions for passing being 500 mN or more.
  • Color fastness testing is carried out for all dyed products including organic (colored) cotton. Products that have been scoured and bleached only are exempted from color fastness testing.
  • Tensile strength examination: A test of towel scarves without piles should yield results of more than 98N and should take the type of material into consideration. However, a warning label must be attached to the towel.
  • When 0.03 free formaldehyde absorbance difference is converted to ppm, it should be equivalent to less than 9.6ppm.
  • Regarding rate of dimensional change for woven towel products with gauze weaving and/or elastic material (hard-twisted threads, Spandex, etc.), reference values are not applicable.