Schedule – IV

Glass Manufacture


1.         Definitions - For the purpose of this schedule -


(a)                “efficient exhaust draught” means localised ventilation effected  by  mechanical  means for the removal of gas,  vapour,  dust  or fumes  so  as to prevent them (as far as practicable  under  the atmospheric  conditions usually prevailing) from  escaping  into the  air of any place in which work is carried on.  No  draught  shall be deemed efficient which fails to remove smoke  generated at the point where such gas, vapour, fume, or dust originate;


(b)                “lead  compound”  means any compound of lead other  than  galena which, when treated in the manner described below, yields to an aqueous solution of hydrochloric acid a quantity soluble  lead compound  exceeding, when calculated as lead monoxide, five  percent of the dry weight of the portion taken analysis.

The method of treatment shall be as follows :-


A  weighed  quantity  of the material which has been  dried  at  100 degrees centigrade and thoroughly mixed shall be continuously shaken for one hour at the common temperature with 1,000 times its  weight of an aqueous solution of hydrochloric acid containing 0.25 per cent by weight of hydrogen chloride. This solution shall thereafter  be allowed  to  stand for one hour and then filtered.   The  lead  salt  contained in the clear filterate shall then be precipitated as  lead sulphide and weighed as lead sulphate.


2.         Exhaust  draught - The following processes shall not be  carried  on   except  under an efficient exhaust draught or such other  conditions as may be approved by the Chief Inspector :-  



(a)               the mixing of raw materials to form a “Bator”;


(b)               the dry grinding, glazing and polishing of glass or any  article  of glass;


(c)               all  processes  in which hydrofluoric acid  fumes  or  ammonical  vapours are given off;


(d)               all  processes  in  the  making  of  furnace  moulds  or  “pots”  including the grinding or crushing of used “pots”; and


(e)               all processes involving the use of a dry lead compound.



3.         Prohibition relating to women and young person - No woman or  young  person  shall  be  employed  or permitted to  work  in  any  of  the  operations  specified  in  paragraph 2 or at any  place  where  such  operations are carried on.


4.         Floor and work-benches - The floor and work-benches of every room in which a dry compound of lead is manipulated or in which any  process  is  carried on giving off silica dust shall be kept moist and  shall comply with the following requirements :-

(a) the floor shall be -

(i)                 of  cement  or  similar  material so as  to  be  smooth  and  impervious to water;


(ii)               maintained in sound condition; and


(iii)             cleansed daily after being thoroughly spread with water at a  time  when no  other work is being carried on the  room;  and

(b)       the work-benches shall -

(i)                 have a smooth surface and be maintained in sound  condition, and


(ii)                cleansed  daily either after being thoroughly damped  or  by  means  of  a suction cleaning apparatus at a  time when  no  other work is being carried on thereat.


5.         Use  of hydrofluoric acid - The following provisions shall apply  to  rooms in which glass is treated with hydrofluoric acid :-


(a)                there  shall  be inlets and outlets of adequate size  so  as  to  secure  and maintain efficient ventilation in all parts  of  the  room;


(b)                the  floor  shall be covered with guttaparcha and be  tight  and shall slope gently down to a covered drain;


(c)                the  workplaces  shall be so enclosed in projecting  hoods  that  openings required for the bringing in the objects to be  treated shall be as small as practicable; and


(d)                the efficient exhaust draught shall be so contrived that the gases are exhausted downwards.


6.         Storage  and  transport  of hydrofluoric acid -  Hydrofluoric  acid  shall   not  be  stored  or  transported  except  in  cylinders  or receptacles made of lead or rubber.


7.         Blow  pipes - Every glass blower shall be provided with  a  separate blow  pipe bearing the distinguishing mark of the person to whom  it is  issued  and suitable facilities shall be  readily  available  to every glass blower for sterilising his blow pipe.


8.         Food,  drinks, etc., prohibited in workrooms - No food,  drink,  pan and  supari  or  tobacco shall be brought into or  consumed  by  any  worker  in  any room or workplace wherein any process  specified  in  paragraph 2 is carried on.


9.         Protective  clothing - The occupier shall provide, maintain in  good repair  and  keep in a clean condition for the use  of  all  persons employed  in  the  processes  specified  in  paragraph  2 suitable  protective clothing, footwear and goggles according to the nature  of  the  work  and such clothing, footwear, etc. shall be  worn  by  the  persons concerned.


10.       Washing  facilities -  There shall be provided and maintained  in  a cleanly state and in good repair for the use of all persons employed in the processes specified in paragraph 2 -


(a)       a wash place with either -


(i)         a trough  with a smooth impervious surface  fitted  with  a  waste pipe, without plug, and of sufficient length to  allow of  at  least  60 centimetres for every  five  such  persons  employed  at any one time, and having a constant  supply  of   water from taps or jets above the trough at intervals of not  more than 60 centimetres; or


 (ii)       at least one wash basin for every five such persons employed   at  any  one  time, fitted with a waste pipe  and  plug  and  having  an  adequate supply  of water  laid  on  or  always  readily available;


(b)       a  sufficient supply of clean towels made of  suitable  material   renewed  daily with sufficient supply of soap or other suitable cleansing material and of nail brushes; and


(c)        a  sufficient  number of stand pipes with taps  the  number  and  location   of  which shall be to the satisfaction of  the  Chief  Inspector.


11.       Medical  facilities and record of examinations and tests - (1) The  occupier  of  every factory in  which  glass  manufacturing  processes are carried out, shall -


(a)                 employ a qualified medical practitioner for medical surveillance  of  the  workers  employed therein whose appointment  shall  be subject to the approval of the Chief Inspector of Factories; and


(b)                 provide  to  the  said medical practitioner  all  the  necessary  facilities for the purpose referred to in clause (a).


(2)       The records of medical examinations and appropriate  tests carried   out  by  the  said  medical  practitioner shall be maintained in a separate  register approved  by the Chief Inspector  of Factories, which shall be kept  readily  available for inspection by the Inspector.


12.       Medical  Examination  by  Certifying  Surgeon -  (1)Every  workers  employed in processes specified in  paragraph  2  shall  be examined by the Certifying Surgeon within 15  days  of   his  first employment. Such examination shall include  pulmonary function tests and in suspected cases chest X-ray as  well  as tests  for lead and urine.  No worker shall be allowed  to  work after  15  days  of  first  employment  in  the  factory  unless  certified  for such employment by the Certifying Surgeon.


(2)               Every worker employed in the said processes shall be re-examined by the Certifying Surgeon at least once in every twelve calendar  months.   Such  re-examination shall,  wherever  the  Certifying  Surgeon considers appropriate, include tests as specified in sub-paragraph (1).


(3)               The Certifying Surgeon  after examining a worker, shall issue  a Certificate  of Fitness in Form 23.  The record  of  examination and re-examination  carried  out  shall  be  entered  in   the  Certificate and the Certificate shall be kept in the custody  of  the  manager  of the factory.  The record  of  each  examination  carried  out  under  sub-paragraph (1)  and  (2),  including  the nature  and the results of the tests, shall also be entered  by the Certifying Surgeon in a health register in Form 24. 


(4)               The Certificate of Fitness and the health register shall be kept  readily available for inspection by the Inspector.


(5)               If  at any time the Certifying Surgeon is of the opinion that  a worker is no longer fir for employment in the said processes  on the ground that continuance therein would involve special danger to the health of worker, he shall make a record of his  findings in  the said certificate and the health register.  The entry  of  his  findings in those documents should also include the  period  for which he considers that the said person is unfit for work in  the  said processes.  The person so suspended from  the  process  shall be provided with alternate placement facilities unless  he is fully incapiciated in the opinion of the Certifying  Surgeon,  in which the person affected shall be suitable rehabilitated.


(6)               No  person  who  has been found unfit to work as  said  in  sub-paragraph  (5) shall be re-employed or permitted to work in  the said  processes  unless the Certifying Surgeon ,  after  further  examination,  again  certifies him fit for employment  in  those processes.


13.       Exemption -  If the Chief Inspector is satisfied in respect  of  any  factory  or any class of process that, owing to the special  methods of work or the special conditions in a factory or otherwise, any  of   the requirements of this schedule can be suspended or relaxed without danger  to the persons employed therein, or that the application  of  this  schedule or any part thereof is for any reason  impracticable,  he  may  be  certificate in writing  authorise  such  suspension  or relaxation as may be indicated in the certificate for such period and  on such conditions as he may think fit.