Lam tham coi co nhieu each de tao ra nhieu loai tham nhu: tham se, tham doc, tham nit, tham dan...
D6i voi tham doc: ngudi ta doc moi day hinh dep theo loi doc nong ba, Trong do moi sgi doc co the gom 3, 5, 7,.. sgi c6i.
Dung khu6n g6 hinh vu6ng, ehii nhat tuy theo kich cd, hinh dang cua tam tiiam coi can che tac de quan cae sgi day coi da doc thanh timg tham coi (ggi la ban khau tham coi). Tren be mat ban khau tham coi co dong hai hang dinh theo hai dudng cheo (ciia hinh vu6ng, chu nhat) de cang, ep cac sgi day coi da doc vong quanh tir trong ra ngoai theo nhung cay dinh dong tren mat khu6n g6 lam mau giii.
Day coi da ddc de quan ep lam tham coi rat dai, dudng nhu "v6 tan". Do dai day coi doc phu thugc vao kich cd, dien tich ciia m6i mieng tham coi.
Khi cae sgi coi doc quan thanh tam tham da xong, ngudi thg se khau tham coi bang cac sgi gai hoac sgi ni 16ng. Cac dau m6i sgi khau dugc cat dau kheo leo trong long tam tham.
Nhirng chiec dinh ddng tren be mat khu6n g6 thudng dugc lam bang thep "ggng 6" hoac loai dinh t6t da dugc cat b6 phan mii. M6i chiec dinh dong tren khu6n g6 (theo duomg cheo) each nhau chung 1cm.
+ Tao mau tham coi: m6i tam tham rieng biet thuomg chi c6 mgt mau nao do.
Nhung sgi coi dugc nhugm mau, phoi kho trudc khi dua vao ben doc thanh sgi day tao nen tam tham, ggi la "sgi quai". Doc nhirng sgi day coi nay ggi la "doc quai".
+ Gap, quan quai coi (gap r6i quan sgi quai coi tren khung g6 de tao thanh
mgt tam tham coi): Trudc het gap di gap lai sgi quai coi thanh mgt mang vu6ng nho lam loi giira ciia tam tham. Dat loi giira nay vao chiec dinh 6 giir khung g6, r6i lan lugt quan quai coi vong quanh theo chieu kim d6ng h6 theo cac hang dinh 6 b6n phia ban khung gO' '^^^ Quan vira diing biia de v6 ve phia tam cho mjn chat birc tham va tao thanh cac goc vuong.
+ Khau tam tham coi: diing kim loai to, khau bang soi gai hay ni 16ng, khau tir
trong ra ngoai theo 4 phia, moi miii khau each nhau chimg 4 den 5 phan. Day la loi khau gap khiic, ggi la khau "hang giun",
Khi khau tham c6i kha Idn, lam bang loai thep tot to co chimg mgt ly, dai khoang mgt gang tay. Ngudi dig diing tay de an xuyen mui kim qua birc tham c6i roi dung kim tiiep (loai co ngam) de kep nit kim khau. Khi an kim khau xuyen qua birc tham coi, ngudi thg dung mgt mieng simg hay mgt manh go tot dat trong long ban tay lam "dot" de ty an chu6i kim cho dii lire va tranh bj chuoi kim khau dam vao ban tay. Dgng tac khau tiiam coi ciing kha ton c6ng siic. Theo cac nghe nhan dja phuong lang Kien Thai thi viec khau tham coi lau ngay ciing de bj anh hudng tdi than kinh tim
ngudi thg. Trong khi khau tham coi, ngudi thg dung b6ng hoac mieng xop co ikm dau
md (dung trong mgt cai bat) de b6i tron miii kim khau.
+ Dau tham coi (ghep cac mieng tham nho thanh mang tham to).
Day la viec ghep cac mieng tham coi (ciing mau hoac khac mau) lai de tao thanh mang tham to rgng. Cae mieng tham coi khac mau dugc ghep lai tao thanh birc tham c6 mau sac sinh dgng, hai hoa (tua nhu ta lat gaeh men tag nen mgt nen gaeh co mau sac phong phii).
Th6ng thudng, each khau dau cae mi?ng tham coi la khau dau mep tren cua cac mieng tham lai vdi nhau, de moi khi can ngudi ta co the de dang gap mang tham coi Idn lai, vu6ng vdn thanh mgt khoi, ggn gang va tien lgi; ngugc lai co the nhanh ch6ng trai mang tham ra tren mgt dien tich rgng.
Kim, chi va nhung dung cu khau dau tham gi6ng nhu khau tam tham (nhu da gioi thieu 6 phan tren). Su khac biet 6 day la each khau. Khau dau tham tiiudng duge khau luon vat cheo nhu loi vat s6 (trong may mac).
+ Tao hoa van tham coi:
Theo truyen thong, de tao hoa van trang tri tham coi, ngudi ta diing cac sgi coi da se sEn dan thanh hmh hoa van (tua nhu dan may, tre) r6i khau gin len be mat moi vu6ng tham coi. Gan day, vdi ky nghe cai tien, nghe nhan co tiie dan, cai hoa van true ti8p vao timg vuong tiiam coi tiieo cac mau ma eo san. Tuy nhien ky nghe dan cai true tiep nhu tiie doi hoi phai co sir kheo leo, tay nghe dieu luyen.