I wanted a product to write on smooth surfaces such as glass, glass tables, white boards or jam jars. These markers to the beveled edge can create pretty "tags" temporary, logos and illustrations (for Christmas or for decorating windows) on smooth surfaces. The colors are vibrant and opaque. A word of advice: you really shake well before Felt start using (about 20 seconds) and make sure to have correctly "pumped" the ink in the tip. It is not enough that the tip (which is white at first) becomes colorful, definitely it is saturated with ink or foam slightly on the draft you use to pump. If the stream is uneven or the chalk appears "aqueous" or if you are forced to interrupt e-frequently to pump / shake again is that you have not pumped enough or not shaken enough early use.
Furthermore, the ink really holds up well once it has dried for at least a few hours (ideal for customizing drinks before a night out, for example, or doing exercises tables to be completed for children), in consideration must be cleaned with a damp cloth. Cleaning is simple but is not immediate: it is necessary to carefully rub in particular by cleaning to the inside of a table and not outside, because as the rinse water is tinted with chalk, you risk dirty wall. In conclusion, I recommend this purchase altogether for illustrations and durable inscriptions (but perfectly erasable!), Bright and opaque colors, and comfortable use (fluid writing and fairly neutral odor) on smooth surfaces .