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'咖啡拉花奶泡技巧視頻-初學咖啡心形拉花技巧'

'/uploads/allimg/161221/8-161221115I4294.jpg'

'咖啡,拉花,奶泡,技巧,視頻,初學,心形,咖啡,存在,形成,'

'咖啡脂的存在是形成咖啡拉花的一個重要因素。 在光學顯微鏡下觀察咖啡脂，可以看出裏面包含有氣泡、脂肪顆粒以及一些比如咖啡豆細胞壁碎片之類的固體顆粒 而用於製作咖啡拉花的熱牛奶也經過了預先處理，通過攪拌或者其他的方法，熱牛奶的表面形成了一層牛奶'

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''

'2016-12-21 11:57:39'

'2016-12-21 11:57:37'

'89404'

''

''

''

''

'咖啡拉花奶泡技巧視頻-初學咖啡心形拉花技巧'

''

''

''

''

''

''

''

NULL

'<div>
	咖啡脂的存在是形成咖啡拉花的一個重要因素。</div>
<div>
	&nbsp;</div>
<div>
	在光學顯微鏡下觀察咖啡脂，可以看出裏面包含有氣泡、脂肪顆粒以及一些比如咖啡豆細胞壁碎片之類的固體顆粒</div>
<div>
	&nbsp;</div>
<div>
	而用於製作咖啡拉花的熱牛奶也經過了預先處理，通過攪拌或者其他的方法，熱牛奶的表面形成了一層牛奶和空氣混合而成的 微泡沫 （ Microfoam ） 。</div>
<div>
	&nbsp;</div>
<div>
	如何讓牛奶起的泡沫又多又持久，也可以成爲科學研究的課題。 @雲無心 就做過這樣的研究，有 實驗室手記之卡布奇諾的泡泡 一文爲證。</div>
<div>
	在混合熱牛奶和濃縮咖啡的過程中，我們有兩種泡沫混合在一起，一種是牛奶表面的空氣和牛奶混合的泡沫，一種是濃縮咖啡表面的脂肪、氣體和濃縮咖啡混合的咖啡脂泡沫。這兩種泡沫都相對穩定，咖啡脂的泡沫一般可以維持 10 分鐘左右的時間 ，牛奶和空氣形成的泡沫也可以維持數分鐘之久</div>
<div>
	這兩種泡沫混在一起之後，由於它們的顆粒都很大（都是微米級別的大小），並且互相擠在一起，顆粒的擴散過程是很慢的，在沒有攪拌的情況下，兩種泡沫之間混合的速度會很慢，因此，泡沫之間的界限會在很長時間內保持清晰。這樣，咖啡師傾倒牛奶時做出來的圖案可以保持足夠長的時間，以供顧客欣賞。</div>
<div>
	&nbsp;</div>
<div>
	所以說，咖啡拉花實際上是兩種泡沫（而非液體）混合出來的效果。知道了這個以後，再看咖啡拉花，除了讚歎之外，是不是增添了一份其他的感受呢？</div>
<div>
	&nbsp;</div>
<div>
	有讀者可能會問了，爲什麼非得泡沫混合在一起纔行，不同顏色的液體混合在一起就不行嗎？</div>
<div>
	&nbsp;</div>
<div>
	如果兩樣都沒有泡沫，當我們把牛奶倒入咖啡的時候，其實它們也不是立刻就互相均勻混合的。雖然仔細說來這兩種液體內部仍然是有微米大小的顆粒，但是這些顆粒並沒有互相挨着，並且顆粒只佔液體的很小一部分，並沒有泡沫的那種穩定性。所以，這兩種液體混合的界面不但因爲內部液體的流動很不穩定，界面也會因爲擴散的原因很快變得模糊起來，不能夠做成拉花的圖案。</div>
<div>
	而我們這裏要說的咖啡拉花的事情，就完了。<br />
	<img alt="" src="/uploads/allimg/161221/8-161221115I4294.jpg" style="width: 279px; height: 220px;" /></div>
'

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        'category' => 'category.html',
        'search' => 'search.html',
        'show' => 'show.html',
      ),
      'cat_field' => '',
      'module_field' => '',
      'html' => 0,
    ),
    'displayorder' => '0',
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    'namerule' => '{typedir}/{Y}/{M}{D}/{aid}.html',
    'namerule2' => '{typedir}/list_{tid}_{page}.html',
    'mid' => 'article',
    'pcatpost' => 1,
    'topid' => '1',
    'domain' => '',
    'catids' => 
    array (
      0 => '305',
    ),
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    'total' => 7,
    'field' => 
    array (
    ),
  ),
)

'/views-90173-[page].html'

''

'https://makecoffee.gafei.com/views-90173'

array (
  's' => 'article',
  'c' => 'show',
  'id' => '90173',
  'm' => 'index',
)