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About product and suppliers:
        Alibaba.com offers 1,263 opaque envelopes products. About 71% of these are mailing bags, 6% are paper envelopes, and 1% are paper crafts. 

A wide variety of opaque envelopes options are available to you, such as ordinary paper, kraft, and poly. You can also choose from business envelope, gift envelope. As well as from wallet envelope, window envelope. And whether opaque envelopes is free samples, or paid samples. 

There are 1,258 opaque envelopes suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Hong Kong, and India, which supply 98%, 1%, and 1% of opaque envelopes respectively. 

Opaque envelopes products are most popular in North America, Oceania, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 1,047 with Other, 262 with ISO9001, and 57 with ISO14001 certification.