原帖由
mikebear 於 2013-6-5 03:54 PM 發表
Game Color係比戰棋用, 所以要襟挖d
citadel 都係
但個人用落model color 比gamecolor 好油, gamecolor沈澱比較利害
lifecolor 同model color都好好油(手油), lifecolor比較其他最稀, 嘖就model ...
對!!!
有關水膠彩用於噴塗方面, 是其最大弱點!!!
其原因就係因為是水.
Lifecolor, Vallejo 是真正的水性油, 它們的載體就正正是水. 對於噴塗有重大關係的霧化效果, 與油漆類別關係非常密切!!
**Fluid Properties Affecting the Spray**
Avariety of factors affect droplet size and how easily a stream of liquid atomizes after emerging from an orifice. Among these factors are fluid properties of **** surface tension, viscosity, density ****
水的表面張力(surface tension) 好勁. 有幾勁? 看看數據:-
**Surface Tension of Common Fluids**
Liquid Surface Tension (Newton/meter at 20°C)
Ethyl alcohol 0.022
Soapy water 0.025
Benzene 0.029
Olive oil 0.032
Lubricating oil 0.037
Glycerine 0.063
Water 0.073 <==== 嘩!
Mercury 0.465
咁, 表面張力的高低, 對霧化效果帶來甚麼影響呢? 睇答案
Surface tension tends to stabilize a fluid, preventing its breakup into smaller droplets. Everything else being equal, fluids with higher surface tensions tend to have a larger average droplet size upon atomization.
所以油性油好噴過水性油, 是有理據的.
Vallejo 其實近幾年已改良過它的Model Air配方超過一次, 它亦建議用其新配方Airbrush Thinner 代替水. 噴塗表現是好些, 但點都不及其他油類. 其新配方亦有顧及清潔的死穴, 清洗噴筆亦冇舊配方咁難搞
但都係只改善少少. 其實Vallejo的所謂"專用"清潔劑, 一聞就知係亞蒙尼亞
始終油性油的清除原理是靠溶解漬油, 只要油漆類別可以再溶解, 那麼話知你是千年油漬都冇有怕.
但水膠彩的全水性油就不同了. 正如mikebear兄所言: "因為干左唔會再溶" <=== 咁咪大鑊囉!
它乾後是似一浸"衣"附著表面, 不再溶........惡搞.