BH7CNC_Jack 之前与 @YofoaStudio 在7区卡片局整理卡片，凭借对印刷工艺和用纸的直觉，判断了古老工艺的卡片，虽然不是上古QSL，但是也很老的了，下面展示： 套印工艺 这套城堡主题卡片应该是一大张印刷然后自行裁剪下来的，每一个风景都有编号（这里不全，强迫症小心）有着一定的收集乐趣，判断为三色套印工艺印刷： 背面：单色印刷 还找到一张同样工艺的卡片： 凸版工艺 这个卡片字符可能是采用的凸版印刷的，但是整体较平整，不排除铅字排版印刷的可能。 这些都是很典型的凸版工艺印刷了，图样是内凹的。 这里也展示一下我收到的同样工艺的QSL卡片： 早期电脑照排工艺 特点是网点直径比较大，呈现同心纹，但矩阵后类似网纹，也比较有特点。 这里也展示一下我收到的同样工艺的QSL卡片： 以上也基本上看见了印刷工艺的进步，就像从电子管到高度集成的今天一样，回味无穷哦（滑稽）
SuoYuC YofoaStudio ? I'm running FT8 and SSB/CW at a ratio of 6:1, and I'm aiming for 7000 QSOs soon.
YofoaStudio SuoYuC Have you checked with the card office to see if your card is still valid? Xiao Zizi especially likes to send FT8 QSL cards.
SuoYuC YofoaStudio In reality, I had to change my location, and I couldn't go all the way to the regional headquarters just for a few cards.
YofoaStudio SuoYuC Doesn't the list include contact information? Then, someone in Crac sent an email asking for help, but they didn't ask for any money.
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