About This Forum

This snuff bottle community forum is dedicated to the novice, more experienced, and expert collectors. Topics are intended to cover all aspects and types of bottle collecting. To include trials, tribulations, identifying, researching, and much more.

Among other things, donations help keep the forum free from Google type advertisements, and also make it possible to purchases additional photo hosting MB space.

Forum Bottle in the Spotlight

Charll shared this beautiful Xianfeng (1851-1861) dated bottle depicting NeZha combating the Dragon King amongst a rolling sea of blue and eight mythical sea creatures.


Chinese Snuff Bottle Discussion Forum 中國鼻煙壺討論論壇
March 28, 2024, 12:13:45 pm
Welcome, Guest. Please login or register.

Login with username, password and session length
 
  Home Help Search Contact Login Register  

Hollow Line Theory ?

Pages: [1]
  Print  
Author Topic: Hollow Line Theory ?  (Read 2118 times)
0 Members and 8 Guests are viewing this topic.
rpfstoneman
Private Boards
Hero Member
***
Gender: Male
Posts: 2340



« on: October 30, 2012, 11:59:25 pm »

Hollow Line Theory (Source:Gotherborg.com, definitions)-

The tendency of the cobalt particles to concentrate on the outer edges of underglaze blue brush strokes or washes. The cause seems to be unknown.  In later porcelain, the effect might have been caused by the porcelain being bisque fired before the decoration being applied.

The technique of bisque firing could have entered the Chinese porcelain industry with the Japanese technology that was introduced during the first decades of the 20th century, where this is the common practice.

In the original theory published by Calvin Chou in 1978 a late Qing time span was suggested during which this would have occured. The thought is the "hollow line feature" generally strongly suggests a late Guangxu/early Republic date, but similar effects can be found in all periods.

In my readings on this subject, many feel this theory does not hold water in regard to dating.

The first picture is taken through a microscope at 100 X enlargement of a very thin line in the decoration on a Chinese porcelain dish which from general criteria are datable to the late Guangxu/early Republic Period, first decades of the 20th century, clearly demonstrating a "Hollow Line". "Hollow lines" occurs in the entire decoration of this dish as well as in the mark, which imitates a Ming period mark. In this pictures the bubble structure in the glaze is unaffected by the blue area below.

The second is taken through a microscope at 100 X enlargement of a very thin line in the decoration of a Chinese porcelain dish shard from the excavation of the cargo of the East Indiaman Gotheborg, which foundered in 1745. All porcelain pieces in this cargo was most likely from the 1720-40 period. The pictures demonstrates a normal underglaze blue line with no "Hollow Line". The shard and its decoration is typical for the cargo. It could be noted that in this picture there seems to be less bubbles in the glaze over the blue areas.

(Photo Sources: Jan-Erik Nilsson, 2003)



* hollowline.jpg (39.45 KB, 400x800 - viewed 38 times.)

* nohollowline.jpg (16.49 KB, 400x400 - viewed 35 times.)
« Last Edit: October 31, 2012, 12:34:29 am by rpfstoneman » Report Spam   Logged

Charll K Stoneman, Eureka, California USA, Collector Since 1979.

Pages: [1]
  Print  
 
Jump to:  

Powered by EzPortal