Many types of private seal not categorised above are usually categorised under the umbrella term "leisure seals". The inscription on leisure seals is usually a short text which is either a quote from a famous writing or just some saying that the owner of the seal thought is important. Typical inscriptions on leisure seals include "Respect fate", "Attain wisdom", "Respect", "Use loyalty and humanity in your affairs", among many others. Chinese leisure seals are comparable to Signature blocks with a quote at the end of an e-mail or internet messages where the author append some sort of proverb or saying that they consider valuable at the end. Seal paste There are two types of seal paste (to make the impression) depending on what base material they are made of. The standard colour is vermilion red (or lighter or darker shades of red) but other colours can be used such as black, navy, etc. for specific purposes. Silk: The red paste is made from finely pulverized cinnabar, mixed with castor oil and silk strands. The silk strands bind the mixture together to form a very thick substance. It has a very oily appearance and tends to be a bright red in colour. Plant: The red paste is made from finely pulverized cinnabar, mixed with castor oil and moxa punk. Because the base is a plant one that has been pulverised, the texture is very loose due to the fact that it does not bind. The appearance is sponge like and not oily. Plant-based paste tends to dry more quickly than silk-based pastes because the plant extract does not hold onto the oil as tightly as silk. Depending on the paper used, plant pastes can dry in 10 to 15 minutes. The more absorbent the paper is, the faster it dries as the paper absorbs most of the oil. Also, plant pastes tend to smudge more easily than silk pastes due to the loose binding agent. The paste is kept covered after it has been used, in its original container (be it plastic or ceramic). It is kept in an environment away from direct sunlight and away from intense heat to prevent it from drying out. The paste for silk based pastes need to be stirred with a spatula every month or so to avoid the oil sinking down and drying out the paste as well as to prepare it for use.