木(mu)質黑板
木質黑(hei)(hei)(hei)(hei)板(ban)(ban)(ban)主要是以纖維板(ban)(ban)(ban)、密度(du)板(ban)(ban)(ban)或膠合板(ban)(ban)(ban)為板(ban)(ban)(ban)面(mian)材料制作(zuo)的(de)黑(hei)(hei)(hei)(hei)板(ban)(ban)(ban),板(ban)(ban)(ban)面(mian)經(jing)(jing)處(chu)(chu)理后成(cheng)黑(hei)(hei)(hei)(hei)色。此材料制作(zuo)的(de)黑(hei)(hei)(hei)(hei)板(ban)(ban)(ban)重量(liang)輕(qing),易于(yu)移動(dong),板(ban)(ban)(ban)面(mian)大小可根據(ju)需要進行(xing)加(jia)工,板(ban)(ban)(ban)面(mian)黑(hei)(hei)(hei)(hei)色涂層(ceng)處(chu)(chu)理方法簡單(dan),且黑(hei)(hei)(hei)(hei)度(du)高。板(ban)(ban)(ban)面(mian)經(jing)(jing)過(guo)處(chu)(chu)理后粉筆摩擦附著力強,使用粉筆書寫對比度(du)明顯,板(ban)(ban)(ban)書書寫手感(gan)流利順暢。
缺點(dian):木質(zhi)黑板容(rong)易受潮,黑板保養不好會有扭曲變形(xing)、涂層(ceng)起(qi)皮(pi)、夾層(ceng)開膠等現象。
水泥黑板
依附在墻體上(shang),用砂和水泥制作而成。通常都預(yu)制在室內或室外(wai)的(de)墻壁(bi)上(shang),制作規格沒有統一標準。
缺點:黑板板面制作(zuo)所形成的(de)紋理顆粒(li)粗細不(bu)勻,也不(bu)十分平整(zheng),所涂(tu)刷的(de)黑色(se)涂(tu)料容易退色(se),容易出現(xian)(xian)龜裂和掉砂粒(li)等現(xian)(xian)象,并且(qie)需要經常(chang)涂(tu)刷油漆,比較麻煩。
玻璃黑板
是用(yong)(yong)(yong)5毫米以上的玻(bo)(bo)璃(li)板(ban)制作的,玻(bo)(bo)璃(li)表面是用(yong)(yong)(yong)金剛砂(sha)打(da)磨(mo)或(huo)是用(yong)(yong)(yong)氫(qing)氟酸鋟蝕成毛玻(bo)(bo)璃(li)狀,背面用(yong)(yong)(yong)黑色涂料涂刷或(huo)是黑色材料襯托而成。黑板(ban)的大小以玻(bo)(bo)璃(li)規格(ge)尺寸而定,規格(ge)大的話(hua)需(xu)要拼接。
缺點:玻璃黑(hei)板不易(yi)搬(ban)動,易(yi)破碎,板面黑(hei)度也不夠,不能進行板面處理(li),粉筆摩擦(ca)附著力(li)差(cha),粉筆書寫色彩對比(bi)度不明顯,易(yi)露黑(hei)板底色。
金屬鋼制黑板
一般采用(yong)磁性彩涂鋼板(ban)制作,板(ban)面厚度(du)多在0.2mm—0.4mm之間(jian),此種材(cai)料有耐磨,不脫落,不褪色,經久(jiu)耐用(yong)等特點,并(bing)且書寫手感好,字跡清(qing)晰,易寫易擦。內芯材(cai)料為七(qi)層消音防潮瓦楞紙,背板(ban)為防銹熱(re)鍍鋅板(ban),邊框為香濱色高(gao)強度(du)電泳鋁合金,美觀大(da)方。