1) there is no mention of which factory by me nor tingjunkie on the pot, whilst you seem to make a lot of unrelated, factory comments. we're looking at it as though it is a teapot teapot.
2) if you know factory 1 stuff well, which year was it that they started experimenting with creating this type of partial heini/semi tianqing ni type and who were the people involved?
3) factory 1 shuipings, as of many other shuipings were just a dollar or two a piece when exported then. the recent transacted prices for 黑铁砂水平 of such style for 2012-2013 was around 450 rmb or so. 2014? not sure, not so much on resale on the regular pot forums as everyone had started to hoard since early 2014. i was giving a ball park figure, nothing is for sale here, nothing is transacting. tingjunkie had a lucky find.
4) stickers? there's the original box and white box that used to be quite abundant here, who wouldnt have seen the transition from the round green to the baipiao square v1 and then square v2 and then the round laser label?!...
5) i might need to disappoint you because this might not be simply manganese doped clay.. but its dark hue is contributed to by 黑铁砂, which is iron 2 oxide. various oxidation states can be obtained, if you use clay rich in iron 2 oxide and fire it (which is often a ratio between red iron 3 oxide and black iron 2), you can get a myriad of really dark, greyish black, purplish grey, or even brown dirty grey color depending on the air flow, temperature etc.
6) 70s, 80s up to 1992 at least, there is still 黑铁砂, there is round laser labelled one too. search 黑铁砂水平 in some favourite forums i.e. dyee, potsart, etc.
7) CR to 70s is known for their coarser clay particles, it is natural that 70s pots have a different texture to that of later periods.
chrl42 wrote:It doesn't look Factory-1 stuff.
The photo rather looks 70s Hei Tie Sha with its coarse texture, only it isn't.
Late-80s (and after) doesn't have Hei Tie Sha..but they do have that color of clay but texture not the same.
Factory-1 didn't use a reduction method..Factory-1 Heini is cobalt oxide+manganese oxide mixed....and why do u think it's late-80s (the genuine one doesn't cost over 100 bucks though)?
btw late-80s SPs come in a square sticker, have you seen that?