how to keep shirt collar stiff

{"cid":"91147928","title":"Shirt Interlining Choose from a Variety of Materials for Your Desired Stiffness and Softness","imgUrl":"https:\/\/img.chinax.com\/nimg\/e8\/61\/1b0d7d89c6ea739f18942eb6af00-200x200-1.jpg","attrs":{"Price":"negotiable","Brand Name":"UNT","Model Number":"01","Minimum Order Quantity":"1000M","Delivery Time":"10-15 DAYS","Certification":"OEKO\/GRS","Place of Origin":"SHANGHAI, CHINA","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,MoneyGram","Supply Ability":"1000000meters\/month","Packaging Details":"PE plastic bag and Nylon bag; the roll packed by transparent strong plastic bag, the outside by strong woven polybag.","Products Type":"interlining , lining","Item No":"Cotton interlining","Sample":"Free","Fusible":"Yes\/No","Adhensive":"HDPE \/ LDPE","Packing":"50meters \/ roll , 1 rolls \/ bale","Features":"Shrink-Resistant, Stiff","Yarn Count":"12s*12s","Item":"miya5850","Loading Port":"Shanghai,Ningbo,Tianjin","Width":"90-150cm","Weight":"40-120gsm","Weave":"Plain"}}