Meanco Glass Industrial Co., Ltd.  

Product Name: Glass Lid, Normal Dome Tempered Glass Lid for Cookware Model NO.: G type Certification: FDA, CE/EU, LFGB Material: Glass Cookware Parts Type: Lids Color: Transparent Customized: Customized Shape: Round Samples: Free: Quality Control: 100% Inspected Steam Vent: Can Be Required: Logo Printing: Can Be Required Glass Color: Clear/Blue/Green/Brown: Glass Shape: Round/Oval/Square/Rectangular Trademark: Meanco Transport Package: Inner Packing: Lined with Paper Specification: Outer pakcing: 5 ply-corrugated cartons Origin: Made in China HS Code: 7010200000 Product Description Material of tempered glass lid: Float glass Glass Thickness: 4mm or 5mmSilicon Heat resistance: 220 degree centigradeGlass Heat Resistance: 320 degree centigradeThermal shock: 180 degree centigradeOptional stainless steel rim: SUS201, SUS202, SUS301, SUS304 Diameter: 10-50cm (Max. Dia. 50cm for round type, Max. Diagonal line length 45cm for square or rectangular lid ) Heat resistance: 320 degree centigrade Thermal shock: 180 degree centigrade Break-resistance: Five times of normal glass Excellent transparency allows for checking on cooking food at a glance Shape: Square, round, oval, rectangleColors: Clear, blue, green, brown, etc.Optional steam vent, logos and decorations.Dishwasher safe for easy clean upSample Terms: Samples are available upon receipt of your requestsPackage detail: Inner packing: Lined with Alikali paper, Outer pakcing: 5 ply-corrugated cartonsTestforqualitycontrol:1.FLATNESS CHECKPlace the glass lid on a completely smooth table , and put a piece of 1mm thickness iron plate beside the ring the glass lid, then moving the iron gauge along with the circumference of the lid, the glass lid passes the test if the iron plate does not push in2. HTERMAL SHOCKPut the glass lid into oven temperature to 200°C, and constant temperature for 30 minutes, remove it immediately into 20°C water , glass no broken or crack3. IMPACT TESTPlace a lid, domed size up, on a hard surface,Dropping a 225 grams steel ball from a height of 1.5meter,No fracture no shatter, to passNote : Don't drop the ball near or onto a vent hole /rivet hole4.SCRATCH TEST (PRESSURE TEST)Use 120-grit (abrasive paper ) sandpaper to scratch two side and three directions 15 times, then put into room temperature water for 15 minutes, it pass if no breakage and no crack.5. POLOLARISCOPE CHECKTo test the balance of compressive stress and tensile stress depends on the color what you see.6. FRAGMENTATION CHECKApply tape (adhesive film)on the convex (front) surface of the lid, domed side upward, break it with a hammer broken 5X5cm measuring range , number of particles (fragments) counted should be at least 40,The purpose of this test is to determine whether the glass has been adequately toughened.