Optionally the olefinic naphtha has a low content of acids.
任选地，所述烯烃石脑油含低含量的酸。
2
The non-olefinic resins may be chlorinated or non-chlorinated.
所述非烯属树脂可以是氯化的或非氯化的。
3
Additionally, the light-sensitive monomer contains more than two olefinic bonds, so that the light susceptibility is improved and the UV exposure is reduced.