Porcelain is an extremely hard ceramic that is used in many craft, construction and home building projects. Due to porcelain's extremely hard texture and glazed appearance, drilling holes in it requires a bit of care and expertise. With the proper tools and technique, drilling holes in porcelain plates can be accomplished quite easily.
Place the porcelain plate onto a horizontal surface. Attach a diamond hole saw onto the electric drill. Plug the drill into power source.
Decide where you want the hole to be in the porcelain plate. Mark it with a with a piece of duct tape. Duct taping the spot where you want to drill a hole preserves the porcelain so it will not crack when you start to drill.
Position the anti-slip guard plate onto the spot that you have applied the duct tape to. Press down hard on the anti-slip guard plate for it to stick to the location. The more pressure you apply the firmer it will attach to the porcelain.
Push the diamond hole saw into the size hole on the anti-slip guard that you want to drill into the porcelain. Slowly start to drill for five to 10 seconds at a time. Stop and allow the drill to cool between each drilling interval. Drill until a slight depression is made.
Remove the anti-slip guard from the porcelain. The porcelain has a depression from the preliminary drilling. The anti-slip guard is no longer needed to continue drilling the hole into the porcelain plate.
Replace the diamond hole saw back into the round depression on the porcelain plate. Resume drilling again in intervals of five to 10 seconds.
Take a wet sponge and cool the drill bit in between the drilling sequences to preserve the drill bit and to prevent overheating. Repeat Steps 5 and 6 until the hole is completely drilled through the porcelain plate.
Always wear safety goggles when operating any drilling machinery.