The ink in the edding 4200 porcelain brush pen is designed for decorative purposes and is not intended for areas of the porcelain that are used for cutting, eating or drinking (i.e. you should only decorate the rim of a plate or the outside of a mug). So it won’t withstand scratches from knives and forks, etc., although it does contain an additive to make your personalised design more robust and give it the best possible protection from scratches.
Depending on the type of material and the amount of use, we cannot rule out the appearance of slight signs of wear. When loading and unloading the dishwasher, take care that your hand-designed item isn’t subject to friction and rubbing, by positioning it in the dishwasher so that it doesn’t come into contact with other items of crockery and cutlery. When washing up by hand, avoid using a washing-up brush or harsh cleaning aids such as abrasive cream cleaners and scourers.