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Moisture Regain tester 70S

UNI EN ISO 2060, ISO 6741-1, ISO 6741-2, ISO 6741-4, ASTM D1576-01, ASTM D2495, UNI 9213-1, IWTO 33, IWTO34, UNI 9213-2, UNI 9213-3, UNI 1335, UNI 9

Oven drying method to determine the conditioned mass of fibers and yarns



Fiber moisture Regain oven
Cod. 70S - Automatica Mod.A
Cod. 70S - Automatica Mod.B
Manutenzione - Servicing
Supporto remoto - Remote support
Parti di ricambio - Spare parts

The textile fibers have hygroscopic features and can absorb or lose a variable amount of water in relation to temperature (°C) and relative humidity (%) of climatic conditions where they are stored; e.g. the wool absorbs up to 30% of moisture content without feeling it by human touch.

The moisture content (MC%) and moisture regain (MR%) of textile fibers become relevant factors for commercial negotiations, because of frequent disputes commonly met by suppliers and customers, thus it's very helpful to determine the most precise percentage of moisture content that a material can have; the fiber conditioning permits the enduser to evaluate the Calculated Invoice Mass (%) of a bulk consignment.

The result is calculated by determining the Oven-Dry Mass of core sample analyzing the moisture content and regain after the drying processes in compliance to the conventional regain (%) of textile materials.

According to the Standards UNI, ISO, IWTO, ASTM in terms of linear density, the Regain tester 70S is a rapid drying oven extremely useful in several production areas as e.g. cotton spinning mills and ginneries, but widely used also in public conditioning and research centres and other laboratories for fiber classification.

The fibers are dried up to (105 ± 2)°C for most part of textile materials and up to (130 ± 2)°C for silk samples. The oven-drying method allows the operator to determine the dried mass once determined a difference of weights between two next dryings is lower than the maximum difference acceptable of X < 0,05%.


In order to speed up the processes, the air flow at negative pressure allows to do rapid drying cycles in an extreme short time (with 400 g less than 7 minutes) maintaining the material soft and uniform after a visual inspection with microscopes.


The benefit of Regain tester 70S is given by the action of water vapor diffusion from the hearth of the fiber without damaging it as shown in comparative tests made by Mr. M. Denis (Directeur de la S.A. Les Conditionnements Publics Vervičtois) and by Mr. L. Rousseau (Directeur du Centre de Recherches et de Controle Lainier & Chimique de Verviers in Celac), where fiber materials dried with Regain tester 70S don't change physical properties during the dyeing process compared to the fiber dried with traditional models, which present alterations of the outer shape of fibers through the comparative analyses made under visual inspection with microscope.

Regain tester 70S is composed of a drying oven chamber constituted by a bell sealed area where all four side walls are properly covered by external insulation and assure constant and uniform temperature in every points of the drying chamber, thus opening flap in the air outlet on the rear side of the oven to avoid flotation errors due to buoyancy effects, convective air motions that may influence the precise weighing measurements.

The temperature is regulated by an advanced P.I.D. logic control that ensures a constant and uniform drying temperature inside the oven.

METTLER TOLEDO precision scale with a reading accuracy of ± 0,01 g can measure up to 4 Kg of material put into the basket, while the reading of weighing masses can be red directly on the display.

The purpose of Branca Idealair is to let the operator totally free of any manual inter actions, but excluding only the preliminary preparation of samples, while all drying cycles include the automatic weighing and records saving of dried weights after each drying process that are done automatically.
The advantage helps users to get more time to follow other activities and enjoying of the full potential technology of Regain tester 70S.


Automatic processes of Regain tester 70S are managed by a logic programmable unit properly integrated with temperature close-control; the PID control improve reliability and precision on temperature regulation operating across solid state relays with a temperature probe.


An application Software for Statistical Analyses manages data transmission/reception and further calculations thanks to the mathematical formulas of Microsoft Excel; the software license is a dongle USB that enables add-ins toolbar of Excel easy to install and easy to use.


An optional ASCII PRINTER is designed to print after each test an overall report showing all masses collected after every single drying process, and also the calculations of moisture regain, moisture content and the calculation of merchant correction to apply to material batches; the ASCII printer can be supplied in thermal or matrix impact version on request.

The conditioning certificate includes the following statement:

  • DATE and TIME
  • TARA, weight of the basket
  • CORE SAMPLE WEIGHT, weight of core material taken in sampling
  • OVEN DRY WEIGHT, weight of the core sample after all moisture has been removed by drying process
  • LOSS, difference in weight between the Core Sample Weight and the Oven Dry Weight. The Loss represents the weigth of water which was present in the core sample
  • REGAIN, weight of water in the core sample expressed as a percentage of the Oven Dry Weight
  • NETT WEIGHT, OVEN DRY, weight of oven dry material calculated to be in the consignment
  • OFFICIAL REGAIN, at reference percentage is the weight which must be added to the Nett Weight, Oven Dry to determine the Invoice Weight at the nominated Regain
  • INVOICE WEIGHT, weight of material which would be present if it was conditioned to the nominated Regain

Regain Tester 70S complies with the Standard IWTO 33, IWTO 34.

Customer references



Weighing range: 0 ÷ 4100 g;
Scale accuracy: +/- 0,01 g;
Heating: 14 KW;
Drying T(°C) range: 40 ÷ 105°C (Max 140 °C);
Close-control: ± 0,5°C;
Basket diameter: 245 mm;
Basket height 1: 310 mm for raw materials;
Basket height 2: 190 mm for Skeins;
Basket height 3: 220 mm for low basis weight;
Drying time: 5 minutes for raw material;
Drying time: 10 minutes for yarn skeins;
Power supply: 3 PH+ Neutral + PE (voltage to be defined);
Dimensions: 1030 x 630 x 1000 mm;
Net weight: 170 kg;

TEXTILES FIBERS (Official Regain value %):
Wool and worsted yarns: 18,25 %
Washed wool and carded yarns: 17,00 %
Natural silk: 11,00 %
Cotton: 08,50 %
Viscose: 13,00 %
Acrylic: 2,00 %
Discontinuous polyamide (Nylon): 06,25 %
Polyester discontinuous: 1,50 %
Blend filbers: (XX, XX) %

* The "Blend fibers" can be set by the operator inside initial setting screen *

If samples contain mixed fibers of different material, then the operator can set the presence percentage of fibers per material.

Regain Tester 70S is mainly used in the laboratories for fiber classification and quality control or in conditioning areas.


Combed yarns and wool: 18,25%;
Carded yarns and washed wool: 17,00%;
Natural silk: 11,00%;
Cotton: 08,50%;
Viscose: 13,00%;
Acrylic: 02,00%;
Discontinuous polyamide (Nylon): 06,25%;
Discontinuous polyester: 01,50%;
Other fibers: XX, XX%;

* The "other fibers" is configurable through a numeric keypad on HMI panel operator;

If the test sample contains two or more fibers with a different Regain the management software of the Regain tester calculates automatically the correct Regain to be considered.

The Moisture Regain tester is suitable in the laboratories for Textile, for fibers analysis and as a reference instruments all other applicable driers, hot plates, etc..;

  • Moisture-Regain-tester-for-fibers
  • Biella-Public-Conditioning
  • Fiber-Conditioning-Oven

Ricambi e accessori

Ricambio / accessorio Qta Prezzo
(IVA esclusa)
CONTC49LCRR - Contaimpulsi elettronico (EL) € 118,00 112,10
ALIMRS3524 - Alimentatore (EL) € 19,00 16,15
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