We have been asked many times how the collars can be starched at home and although we recommend that the collars are taken to a laundry we have found there are many recommendations on the internet.
We can not take responsibility for any advice on the internet however we do recommend that Father Mark Collins' blog on how to starch clerical collars is read.
The link to Father Mark Collins' blog is:
http://fathermarkcollins.blogspot.com/2008/10/how-to-starch-clerical-collars.html