The campaign has been handled by Watson Phillips Norman and is being sent out to warm prospects, who are mostly elderly, known to give to charity or have expressed an interest in the RNID in the past.
The calendar, which includes work by deaf artists, has been designed to be long and thin, so that it can fit through letterboxes and, at the same time, stand out from other post.
The pre-paid envelopes, which can be torn off and donations dropped in, are designed to appeal to older donors who are less likely to organise direct debits.
Gail Cookson, Watson Phillips Norman client services director, said: "If this initiative proves successful the exercise will be repeated next year to a wider audience.
"We believe that this well be a popular initiative as RNID's donors tend to be older and therefore prefer to give cash rather than make direct debits."
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