Showing posts with label quality. Show all posts
Showing posts with label quality. Show all posts

2017-08-24

water comparing 1

Not all water the same. By comparison to find better ones.
These are some bottled still spring water and or still mineral water.
Fuji, Highland Spring, Volvic, Co-op,VOSS...
Brands
 
Unit: mg/L
Fuji

Highland Spring

 Volvic (Danone 
   Waters)
Co-op
Fairbourne
 
Springs
 VOSS

(a USA
 company
but majority
 of control :
 a PRC Chinese
company
Reignwood
Group )
DescriptionArtesian
water.
UV treated
drinking
water
Still Spring
water
Natural
Mineral
Water
(filtered
by volcanic
 rocks)
Still
natural
mineral
water
artesian
water
(still)
SourceYaqara,
Viti Levu
Ochil HillsClairvic
Spring
Fairbourne
Springs,
Churchstoke,
Montgomery,

Powys
Iveland

CountryFuji IslandsUK
- Scotland
FranceUK
- Wales
Norway
(not in VOSS)
bottleplasticplasticplastic plasticglass
volume 1 Litre1.5 Litre1.5 Litre 2 Litre800 ml
pH at source7.77.87.07.85.5
Bicarbonates153.0150.074.0137.6<20.0
Calcium18.040.512.046.25.0
Chloride*9.0no data15.015.812.0
Fluoride*no datano datano data0.10.1
Magnesium15.010.18.06.01.0
Nitrates1.03.17.36.3
-

Nitrites*no datano datano datano data-
Potassium5.00.76.00.8-
Sodium18.05.612.012.16.0
Sulphate1.05.39.023.45.0
Other:Silica93.0
no data
32.0no data-
Other *not listed
not listed
not listednot listed*not listed
Dry Residue
 at 180
degree C
222.0
170.0
130.0195.044.0

note taken
2017.062017.082017.082017.082017.08

(officially version of released info as on the food labels in packaging,
except VOSS, which is from their official website.
Different from data printed on bottle & in Wikipedia.
Data on bottle is different & fewer. Truth??? )
Their water quality report full version listed more,
including 0.037 mg/L Manganese, 3.381mg/L ±1.004 Radium 226/228 (combined),

 NOTE 1:
  There are non-sparkling still water sold in glass bottles.
Eg. :
Acqua Pana, Evian, Harrogate, Hildon,
Highland Spring, Perrier, San Pellegrino, VOSS, Waitrose, etc.

* NOTE 2:
last dacade there was a specialist website that someone took bottle waters to do lab test.  They found that actual chemicals are usually not necessarily fully listed in packaging. Actual chemicals and Chemicals at source listed in packaging can be different.
Somehow that website was shut down.

NOTE 3:
plastic bottle: Store in odor free environment,
and away from direct sunlight. Once opened, keep chilled and used withing 7 days(or so).
I take that as the plastic has chemicals which can migrate into the water under circumstances. And, for smaller bottles, I read elsewhere that they can be easily become a pedri dish within 24 hours aka brew bacteria once you start drinking from it in contact to your mouth. 


WHY I make this?
I started noticing water about 20 years ago.
I used to drink in office & at home evaporated water
which was popular and said to be very pure.
So I notice odor +/ odd taste
 if I drink tap water.
Then there are people criticize not good to drink water too pure!!
Anyway, in Summer we drink more water. 
If we do not guard well,
it is down to ruin our kidneys & body,
 overloaded with unwanted chemicals. 


WHY tap water is not good?
They typically have hundreds of chemicals
ranging from heavy metals, pesticides, herbicdes, etc,
and anything people put in drainage ,
that include medicine & drugs, etc.
Not to mention all kinds of
hair dye chemicals,
floor polish chemicals,
 drainage caustic acid,
car wash chemicals, etc.
Even just basic lists
 in websites of  some
relatively open water companies
can be scary enough.

Let alone chemicals that
they are not able to filter //
not willing to //
can't afford to test //
dare not to test //
do not release to let people know.

2017-01-09

Audio...Headphones...

A post-Christmas impulsive shopping,
between two portable foldable on-ear headphones, I chose...

A little bit of www search after my purchase...

JVC
(JVC Kenwood)
SONY REF: Average
Ear-bud types
&
head phones.
REF:
Better ones
Model HS-A180 MDR-ZX310  ..  ..
Frequency
Response upper
22000 Hz24000 Hz 20000 Hz 45000 Hz
(Denon AH-D600)

40000 Hz
(Sennheiser HD700)

25000 Hz
(HA-SR50x) 
Frequency
Response lower
10 Hz10 Hz 20 Hz 8 Hz
(HA-SR525)
5 Hz
(Denon AH-D600)
3 Hz
(Bowers & Wilkins P9 Signature)
Imedance
at 1 kHZ
32 ohm 24 ohm 2834 ohm
(BOSE QuietComfort 20)
488 ohm
(BOSE QuietComfort 35)

150 ohm
(Sennheiser HD700)
Sensitivity 103 dB 98 dB 111 dB
(Bowers & Wilkins P9 Signature)
Driver
unit
size
30 mm30 mm  
Dome type
50mm
(Denon AH-D600)

40 mm
colour availability Black, White, Blue, RedBlack, White,
Blue, Red
FeaturesDeep Bass

1.2m cord

Plug:
gold-plated iPhone compatible slim plug
Plug:
gold-plated 4-conductor L-shape stereo mini
Remote control, Mic,
noise-reduction

1.4m cord

volumn control

some may have protective  carrying pouch or case. 

Adaptor.

Detachable cable
Info on Packaging Some
specifications
No specification
of Frequency Response range or Impedance, etc !! 😧
Reiews seen on wwwPositive.

Bought for teenagers.  (T.T)
OK. cheap. comfortable. For short commute. Sound not good.
Other Info







Magent type: Neodymium

Maximum Input:
500mW (IEC)




Maximum
Capacity:
1000 mW

Available as standard type or Android type.



1000 mW

Distortion <0.2% (1KHz/10mW) (Bowers & Wilkins P9 Signature)

Distortion <0.4% (1KHz/10mW)  (Bowers & Wilkins P5 Series 2)


operate with battery (BOSE Quiet Comfort 25 Acoustic Noise Cancelling)
Dimension
(cm)
L21, W17, D5.5
Weight260 g
108 g

125 g
without cord

365 g
(Denon AHD600) ,
413 g (B&W P9)
Price
RPP
USD 25.00 USD 39.99
GBP 25.00
Company HQ Japan  Japan
Made in PRC  PRC mostly PRC
Materials??

I took the JVC one
though I do not norally like get black ones.

I like wider range of frequence response.
Higher impedance is good.

  
Many people said average range for human is 20-20kHz.
But "average" is meaningless.
People
with good hearing,
especially young people and some sensitve people,
the range is more than that.

Why would people be misled to buy average products
sacrificing the enjoyment / capability to hear full range of music/sounds?

Maybe I shall look for something like 8-25kHz or 6 - 30kHz.

Sometimes there are test on www.
Touch wood that I can still hear higher notes.
  
Other notes.
more wireless and or bluetooth headphones are in the market,
the specifications are slightly weaker than the one with wire/cable.



It is strange that in some countries,
manufacturers & retailers withhold specifications
on products.
To me, that is a humiliation of our intellectual capacity.

Oh, is it due to the complains or feedbacks from
those who cannot comprehend data well?

Pity. That drags down the standard of our civilization.
  
p.s.
Originally I plan to get a pair of shoes.
After trying 4, I found the heals, er,
2 too high, 2 too low/flat,
I walked into a supermarket
for retail therapy.

Given you had read
how I evaluate and choose pocket diary,
you won't expect me to just buy a headphone that quick.
    ; )

The previous headphones I have are mostly just the earbud type
which came with either my walkman, discman, mobile phones, etc.

Except one shocking pink one. 😊

Consumers are often not given all the facts
to help make informed decisions.
Some locations of shops do no have data signal to go on line.
Many reviews in the media are not fully neutral.
Consumer magazines reviews are not professional enough, either.