Standard No.:	GB/T 7962.8-2010
English Name:	Test methods of colourless optical glass—Part 8:Bubble
Chinese Name:	无色光学玻璃测试方法　第8部分：气泡度
Chinese Classification:	N05    Material and component for instrument and meter
Professional Classification:	GB    National Standard
ICS Classification:	81.040.01 81.040.01    Glass in general 81.040.01
Issued by:	AQSIQ
Issued on:	2011-1-14
Implemented on:	2011-5-1
Status:	valid
Superseding:	GB/T 7962.8-1987 Colourless optical glass test methods; Examination method for extent of bubble
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	110.0
Delivery:	via email in 1 business day

1 Scope This part of GB/T 7962 specifies the inspection methods, test steps and data processing for the bubble of colourless optical glass. This part is applicable to the inspection on the bubble of colourless optical glass. 2 Normative references The following documents contain provisions which, through reference in this part of GB/T 7962, constitute provisions of this part. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply to this part. GB/T 903 Colorless optical glass 3 Terms and definitions For the purposes of this part, the following term and definition apply. 3.1 extent of bubble extent of inclusions such as bubbles and stones contained in every 100cm3 glass, including its diameter and the total sectional area of all inclusions such as bubbles and stones

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Apparatus 6 Sample 7 Test steps 8 Data processing