This part of ISO 11810 is applicable to disposable and re-usable, as well as woven and non-woven materials used as surgical drapes and/or patient protective covers which claim to be laser-resistant. The purpose of this part of ISO 11810 is to provide a standardized method for testing and classifying surgical drapes and/or patient protective covers with respect to laser-induced hazards. An appropriate classification system is given. It is not the purpose of this part of ISO 11810 to serve as a general fire safety specification. This part of ISO 11810 is limited to testing the secondary ignition of materials that are rated É1 or É2 from ISO 11810-1. All materials reflect portions of the beam and it is necessary for the user to decide whether specular reflection may be a hazard. This measurement, however, is not covered in this part of ISO 11810. The results of this part of ISO 11810 are not to be applied to other wavelengths and temporal formats. The 20 W CO2 laser (continuous wave) has been selected as the laser to be used for this part of ISO 11810. NOTE Users of products tested by this method are cautioned that the laser resistance of a surgical drape and/or patient protective cover will be wavelength sensitive and that a surgical drape and/or patient protective cover are better tested at the wavelength for which it is intended to be used. If tested using other wavelengths, the power settings and modes of delivery need to be explicitly stated.