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Ophtalmic optics - Spectacle frames - ISO 12870 : 2012

Compulsory tests and examinations :

Construction (12870 - COTT)

Accreditation # 1-1497 Scope available on www.cofrac.fr


Marking and information control (12870-MI05)

Accreditation # 1-1497 Scope available on www.cofrac.fr

The following information must be written on spectacle frames:


Bridge distortion/ Lens resistance characteristics (12870-DPMV)

Accreditation # 1-1497 Scope available on www.cofrac.fr

The aim of this test is to measure the permanent deformation of a pair of solar or ophthalmic spectacles by exercising a force of 5 N over a distance equal to 10% of the inter-pupil value and thus to evidence the minimum robustness or the deformation of the bridge of a pair of spectacles.

The sample is compliant if no fracturing or cracking is observed over the frame as a whole, if the permanent deformation is = 2 % of the inter-pupil distances, and if the test lens does not break and remains in its housing.


Endurance (hinges) (12870-SME1)

Accreditation # 1-1497 Scope available on www.cofrac.fr

This test enables us to determine a frame’s mechanical stability, by simulating the gesture of a person carrying his spectacles in one hand (this creates stresses on the hinges and over the whole front of the frame).

The sample is compliant if the frame presents no cracks, fracturing or change in the movement of the arm (the latter must not close back under its own weight), and if the frame presents no permanent deformation in excess of 5 mm in relation to its original position.


Nickel release (12870-LN02)

Accreditation # 1-1497 Scope available on www.cofrac.fr

This test enables us to measure the rate of nickel released by the different parts of metal spectacles frames (rounds, bridges and arms).

For a sample to be compliant, the measured rate of nickel released from the entire frame must be less than 0.5 µg/cm²/week.


Resistance to perspiration (12870-RTR1)

Accreditation # 1-1497 Scope available on www.cofrac.fr

This test enables us to verify the resistance of a frame (metal or plastic material) to perspiration. The frame is suspended above a solution of artificial sweat inside a sealed receptacle which is placed in an oven at 55°C.

The sample is compliant if, after 8 hours’ exposure, it presents neither stains, nor colour alteration and after 24 hours, neither corrosion, nor degradation of the surface nor unsticking of one of the coating layers (on the parts likely to come into contact with the skin).


Resistance to ignition (12870-RI03)

Accreditation # 1-1497 Scope available on www.cofrac.fr

The aim of this test is to check the performance of eye protective equipment or of a pair of ophthalmic spectacles on the contact of an arm mounted at 650 °C.

The sample is compliant if it doesn’t catch fire, and if it does not continue to glow after the flame source has been removed.


Dimensionally stable at high temperatures (12870-SDTE)

Accreditation # 1-1497 Scope available on www.cofrac.fr

This test enables us to test the resistance of the frames of ophthalmic spectacles to high temperatures.

The aim of this test is to find out the deformation of the opening of the arms caused by exposure to a high temperature (55°C). The sample is compliant if deformation does not exceed +6 mm and -12 mm (for large frames) compared to its original position.


Measurement system / Dimensional tolerances (12870-SMTD)

Accreditation # 1-1497 Scope available on www.cofrac.fr

This test enables us to verify the dimensions detailed by the manufacture, marked on all types of ophthalmic spectacles.

The frame is compliant if the measurements made fall within the following tolerances:



Optional tests and examinations :

Resistance to optical rays (12870-RR01)

Accreditation # 1-1497 Scope available on www.cofrac.fr

This test enables us to test the resistance of the frames of optical spectacles (plastic or metal) to 25 hours of intense rays.

The sample is compliant if the loss of colour of the frame is less than or equal to level 4.5 of the grey scale.



A.LU.TEC laboratory
c/o Lycée Victor Bérard
35 quai Aimé Lamy - 39400 Morez - France
Tél. : +33 (0)3 84 33 61 51
Fax : +33 (0)3 84 33 35 13

Accreditation # 1-1497
Scope available on www.cofrac.fr

Only tests identified with symbol
are performed under accreditation covered.


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