weight of 0 404 lbs per linear yard 200 kg m 41 picks by 46 ends and a charring temperature of about 700 u00b0 f 371 u00b0 c an intermediate heat insulating layer 28 may be provided between scorch resistant pad 16 and fabric layer 12 the purpose of intermediate layer 28 is to resist heat penetration from the iron into fabric layer 12 and pad 24 intermediate layer 28 may include a thin layer of insulating material an example of a preferred insulating material is aluminum in the form of a thin flat plate such an aluminum metal plate preferably has dimensions substantially equal to scorch resistant pad 16 and a thickness of approximately 0 010 inches 0 254 mm said thickness provides adequate heat insulation and does not interfere with the free sliding movement of an iron from working surface 26 onto safety panel 14 bumper 22 is sewn onto ironing board cover assembly 10 bumper 22 is provided along the perimeter of safety panel 14 while leaving an opening in the direction of the ironing board nose to permit a user to slide an iron onto safety panel 14 from working surface 26 a single bumper 22 may be provided along the perimeter of safety panel 14 alternatively those skilled in the art will recognize that three straight and separate bumpers 22 may be provided around the three sides of a square or rectangular safety panel 14 shown in fig1 a combination of these methods may also be employed depending upon the.