sentences:  There are no international standards for the storage of plastics so it is common for museums to employ similar methods to those used to preserve paper and other organic materials.A wide range of instruments and techniques can be used in the treatment of plastics including 3-D scanning and printing technologies as a means of reproducing broken or missing parts.Recommended relative humidity for plastics is 50% along with a temperature of 18–20 °C (64-68 °F).